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90069 = 374289
BaseRepresentation
bin10101111111010101
311120112220
4111333111
510340234
61532553
7523410
oct257725
9146486
1090069
1161741
1244159
1331cc5
1424b77
151ba49
hex15fd5

90069 has 8 divisors (see below), whose sum is σ = 137280. Its totient is φ = 51456.

The previous prime is 90067. The next prime is 90071. The reversal of 90069 is 96009.

90069 is nontrivially palindromic in base 4.

It is an interprime number because it is at equal distance from previous prime (90067) and next prime (90071).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90069 - 21 = 90067 is a prime.

It is a super-2 number, since 2×900692 = 16224849522, which contains 22 as substring.

90069 is a lucky number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2124 + ... + 2165.

It is an arithmetic number, because the mean of its divisors is an integer number (17160).

290069 is an apocalyptic number.

It is an amenable number.

90069 is a deficient number, since it is larger than the sum of its proper divisors (47211).

90069 is a wasteful number, since it uses less digits than its factorization.

90069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4299.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 90069 is about 300.1149779668. The cubic root of 90069 is about 44.8254970189.

It can be divided in two parts, 900 and 69, that added together give a palindrome (969).

The spelling of 90069 in words is "ninety thousand, sixty-nine".

Divisors: 1 3 7 21 4289 12867 30023 90069