79764431 has 2 divisors, whose sum is σ = 79764432. Its totient is φ = 79764430.

The previous prime is 79764409. The next prime is 79764439. The reversal of 79764431 is 13446797.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79764431 - 2⁶ = 79764367 is a prime.

It is a super-2 number, since 2×79764431² = 12724728905507522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79764439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39882215 + 39882216.

It is an arithmetic number, because the mean of its divisors is an integer number (39882216).

Almost surely, 2^79764431 is an apocalyptic number.

79764431 is a deficient number, since it is larger than the sum of its proper divisors (1).

79764431 is an equidigital number, since it uses as much as digits as its factorization.

79764431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 41.

The square root of 79764431 is about 8931.0934940801. The cubic root of 79764431 is about 430.4635905147.

The spelling of 79764431 in words is "seventy-nine million, seven hundred sixty-four thousand, four hundred thirty-one".