79311431 has 2 divisors, whose sum is σ = 79311432. Its totient is φ = 79311430.

The previous prime is 79311367. The next prime is 79311457. The reversal of 79311431 is 13411397.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79311431 - 2⁶ = 79311367 is a prime.

It is a super-2 number, since 2×79311431² = 12580606174535522, which contains 22 as substring.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 79311394 and 79311403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79311481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39655715 + 39655716.

It is an arithmetic number, because the mean of its divisors is an integer number (39655716).

Almost surely, 2^79311431 is an apocalyptic number.

79311431 is a deficient number, since it is larger than the sum of its proper divisors (1).

79311431 is an equidigital number, since it uses as much as digits as its factorization.

79311431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 29.

The square root of 79311431 is about 8905.6965477160. The cubic root of 79311431 is about 429.6471433728.

The spelling of 79311431 in words is "seventy-nine million, three hundred eleven thousand, four hundred thirty-one".