53769309 has 32 divisors (see below), whose sum is σ = 80607744. Its totient is φ = 31606080.

The previous prime is 53769293. The next prime is 53769311. The reversal of 53769309 is 90396735.

It is not a de Polignac number, because 53769309 - 2⁴ = 53769293 is a prime.

It is a super-2 number, since 2×53769309² = 5782277180674962, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53769329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183367 + ... + 183659.

It is an arithmetic number, because the mean of its divisors is an integer number (2518992).

Almost surely, 2^53769309 is an apocalyptic number.

It is an amenable number.

53769309 is a deficient number, since it is larger than the sum of its proper divisors (26838435).

53769309 is a wasteful number, since it uses less digits than its factorization.

53769309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457.

The product of its (nonzero) digits is 153090, while the sum is 42.

The square root of 53769309 is about 7332.7558939324. The cubic root of 53769309 is about 377.4373014008.

The spelling of 53769309 in words is "fifty-three million, seven hundred sixty-nine thousand, three hundred nine".