679975057 has 2 divisors, whose sum is σ = 679975058. Its totient is φ = 679975056.

The previous prime is 679974989. The next prime is 679975067. The reversal of 679975057 is 750579976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 459630721 + 220344336 = 21439^2 + 14844^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-679975057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 679974989 and 679975007.

It is not a weakly prime, because it can be changed into another prime (679975067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339987528 + 339987529.

It is an arithmetic number, because the mean of its divisors is an integer number (339987529).

Almost surely, 2^679975057 is an apocalyptic number.

It is an amenable number.

679975057 is a deficient number, since it is larger than the sum of its proper divisors (1).

679975057 is an equidigital number, since it uses as much as digits as its factorization.

679975057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4167450, while the sum is 55.

The square root of 679975057 is about 26076.3313562318. The cubic root of 679975057 is about 879.3551823274.

The spelling of 679975057 in words is "six hundred seventy-nine million, nine hundred seventy-five thousand, fifty-seven".