79434881 has 2 divisors, whose sum is σ = 79434882. Its totient is φ = 79434880.

The previous prime is 79434851. The next prime is 79434899. The reversal of 79434881 is 18843497.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74218225 + 5216656 = 8615^2 + 2284^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79434881 is a prime.

It is a super-2 number, since 2×79434881² = 12619800638968322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79434851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39717440 + 39717441.

It is an arithmetic number, because the mean of its divisors is an integer number (39717441).

Almost surely, 2^79434881 is an apocalyptic number.

It is an amenable number.

79434881 is a deficient number, since it is larger than the sum of its proper divisors (1).

79434881 is an equidigital number, since it uses as much as digits as its factorization.

79434881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 44.

The square root of 79434881 is about 8912.6248097853. The cubic root of 79434881 is about 429.8699462469.

The spelling of 79434881 in words is "seventy-nine million, four hundred thirty-four thousand, eight hundred eighty-one".