79940431 has 2 divisors, whose sum is σ = 79940432. Its totient is φ = 79940430.

The previous prime is 79940411. The next prime is 79940473. The reversal of 79940431 is 13404997.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79940431 - 2⁷ = 79940303 is a prime.

It is a super-2 number, since 2×79940431² = 12780945016931522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79940401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39970215 + 39970216.

It is an arithmetic number, because the mean of its divisors is an integer number (39970216).

Almost surely, 2^79940431 is an apocalyptic number.

79940431 is a deficient number, since it is larger than the sum of its proper divisors (1).

79940431 is an equidigital number, since it uses as much as digits as its factorization.

79940431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 79940431 is about 8940.9412815430. The cubic root of 79940431 is about 430.7799635171.

The spelling of 79940431 in words is "seventy-nine million, nine hundred forty thousand, four hundred thirty-one".