77693231 has 16 divisors (see below), whose sum is σ = 97140480. Its totient is φ = 60367680.

The previous prime is 77693227. The next prime is 77693269. The reversal of 77693231 is 13239677.

It is a cyclic number.

It is not a de Polignac number, because 77693231 - 2² = 77693227 is a prime.

It is a super-2 number, since 2×77693231² = 12072476286438722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77693221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30260 + ... + 32726.

It is an arithmetic number, because the mean of its divisors is an integer number (6071280).

Almost surely, 2^77693231 is an apocalyptic number.

77693231 is a deficient number, since it is larger than the sum of its proper divisors (19447249).

77693231 is a wasteful number, since it uses less digits than its factorization.

77693231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2894.

The product of its digits is 47628, while the sum is 38.

The square root of 77693231 is about 8814.3763817981. The cubic root of 77693231 is about 426.7049958107.

The spelling of 77693231 in words is "seventy-seven million, six hundred ninety-three thousand, two hundred thirty-one".