79055857 has 2 divisors, whose sum is σ = 79055858. Its totient is φ = 79055856.

The previous prime is 79055839. The next prime is 79055869. The reversal of 79055857 is 75855097.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67502656 + 11553201 = 8216^2 + 3399^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79055857 is a prime.

It is not a weakly prime, because it can be changed into another prime (79055057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39527928 + 39527929.

It is an arithmetic number, because the mean of its divisors is an integer number (39527929).

Almost surely, 2^79055857 is an apocalyptic number.

It is an amenable number.

79055857 is a deficient number, since it is larger than the sum of its proper divisors (1).

79055857 is an equidigital number, since it uses as much as digits as its factorization.

79055857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 441000, while the sum is 46.

The square root of 79055857 is about 8891.3360638320. The cubic root of 79055857 is about 429.1851469258.

The spelling of 79055857 in words is "seventy-nine million, fifty-five thousand, eight hundred fifty-seven".