64089831 has 16 divisors (see below), whose sum is σ = 96871040. Its totient is φ = 37363680.

The previous prime is 64089829. The next prime is 64089841. The reversal of 64089831 is 13898046.

It is not a de Polignac number, because 64089831 - 2¹ = 64089829 is a prime.

It is a super-2 number, since 2×64089831² = 8215012875217122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64089831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64089841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42505 + ... + 43986.

It is an arithmetic number, because the mean of its divisors is an integer number (6054440).

Almost surely, 2^64089831 is an apocalyptic number.

64089831 is a deficient number, since it is larger than the sum of its proper divisors (32781209).

64089831 is a wasteful number, since it uses less digits than its factorization.

64089831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86526.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 64089831 is about 8005.6124687621. The cubic root of 64089831 is about 400.1870604240.

The spelling of 64089831 in words is "sixty-four million, eighty-nine thousand, eight hundred thirty-one".