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69905 = 5113141
BaseRepresentation
bin10001000100010001
310112220002
4101010101
54214110
61255345
7410543
oct210421
9115802
1069905
1148580
1234555
1325a84
141b693
1515aa5
hex11111

69905 has 16 divisors (see below), whose sum is σ = 96768. Its totient is φ = 48000.

The previous prime is 69899. The next prime is 69911. The reversal of 69905 is 50996.

69905 is nontrivially palindromic in base 2, base 4 and base 16.

69905 is an esthetic number in base 4, because in such base it adjacent digits differ by 1.

It is an interprime number because it is at equal distance from previous prime (69899) and next prime (69911).

It is not a de Polignac number, because 69905 - 210 = 68881 is a prime.

It is a Duffinian number.

69905 is an undulating number in base 4.

69905 is a nontrivial repdigit in base 16.

It is a plaindrome in base 12 and base 16.

It is a nialpdrome in base 16.

It is a zygodrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 69905.

It is an unprimeable number.

It is a nontrivial repunit in base 16.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1685 + ... + 1725.

It is an arithmetic number, because the mean of its divisors is an integer number (6048).

269905 is an apocalyptic number.

It is an amenable number.

69905 is a deficient number, since it is larger than the sum of its proper divisors (26863).

69905 is a wasteful number, since it uses less digits than its factorization.

69905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 69905 is about 264.3955370274. The cubic root of 69905 is about 41.1942006479.

The spelling of 69905 in words is "sixty-nine thousand, nine hundred five".

Divisors: 1 5 11 31 41 55 155 205 341 451 1271 1705 2255 6355 13981 69905