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53999999 = 317170347
BaseRepresentation
bin1100110111111…
…1100101111111
310202121111001222
43031333211333
5102310444444
65205223555
71223664254
oct315774577
9122544058
1053999999
1128532aa9
1216101bbb
13b258c81
14725942b
154b19eee
hex337f97f

53999999 has 4 divisors (see below), whose sum is σ = 54170664. Its totient is φ = 53829336.

The previous prime is 53999989. The next prime is 54000031. The reversal of 53999999 is 99999935.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-53999999 is a prime.

It is a Duffinian number.

53999999 is a modest number, since divided by 9999 gives 5399 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53999969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84857 + ... + 85490.

It is an arithmetic number, because the mean of its divisors is an integer number (13542666).

Almost surely, 253999999 is an apocalyptic number.

53999999 is a deficient number, since it is larger than the sum of its proper divisors (170665).

53999999 is a wasteful number, since it uses less digits than its factorization.

53999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170664.

The product of its digits is 7971615, while the sum is 62.

The square root of 53999999 is about 7348.4691603082. The cubic root of 53999999 is about 377.9763126353.

It can be divided in two parts, 5 and 3999999, that added together give a palindrome (4000004).

The spelling of 53999999 in words is "fifty-three million, nine hundred ninety-nine thousand, nine hundred ninety-nine".

Divisors: 1 317 170347 53999999