79458857 has 2 divisors, whose sum is σ = 79458858. Its totient is φ = 79458856.

The previous prime is 79458793. The next prime is 79458877. The reversal of 79458857 is 75885497.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56265001 + 23193856 = 7501^2 + 4816^2 .

It is a cyclic number.

It is not a de Polignac number, because 79458857 - 2⁶ = 79458793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79458799 and 79458808.

It is not a weakly prime, because it can be changed into another prime (79458877) 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, 39729428 + 39729429.

It is an arithmetic number, because the mean of its divisors is an integer number (39729429).

Almost surely, 2^79458857 is an apocalyptic number.

It is an amenable number.

79458857 is a deficient number, since it is larger than the sum of its proper divisors (1).

79458857 is an equidigital number, since it uses as much as digits as its factorization.

79458857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2822400, while the sum is 53.

The square root of 79458857 is about 8913.9697666079. The cubic root of 79458857 is about 429.9131914180.

The spelling of 79458857 in words is "seventy-nine million, four hundred fifty-eight thousand, eight hundred fifty-seven".