79626881 has 2 divisors, whose sum is σ = 79626882. Its totient is φ = 79626880.

The previous prime is 79626871. The next prime is 79626893. The reversal of 79626881 is 18862697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54626881 + 25000000 = 7391^2 + 5000^2 .

It is a cyclic number.

It is not a de Polignac number, because 79626881 - 2¹⁸ = 79364737 is a prime.

It is a super-2 number, since 2×79626881² = 12680880355576322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79626871) 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 as a sum of consecutive naturals, namely, 39813440 + 39813441.

It is an arithmetic number, because the mean of its divisors is an integer number (39813441).

Almost surely, 2^79626881 is an apocalyptic number.

It is an amenable number.

79626881 is a deficient number, since it is larger than the sum of its proper divisors (1).

79626881 is an equidigital number, since it uses as much as digits as its factorization.

79626881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 47.

The square root of 79626881 is about 8923.3895465793. The cubic root of 79626881 is about 430.2160100920.

The spelling of 79626881 in words is "seventy-nine million, six hundred twenty-six thousand, eight hundred eighty-one".