679838057 has 4 divisors (see below), whose sum is σ = 679944276. Its totient is φ = 679731840.

The previous prime is 679838021. The next prime is 679838059. The reversal of 679838057 is 750838976.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 209989081 + 469848976 = 14491^2 + 21676^2 .

It is a cyclic number.

It is not a de Polignac number, because 679838057 - 2²⁶ = 612729193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679838059) 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 in 3 ways as a sum of consecutive naturals, for example, 42848 + ... + 56529.

It is an arithmetic number, because the mean of its divisors is an integer number (169986069).

Almost surely, 2^679838057 is an apocalyptic number.

It is an amenable number.

679838057 is a deficient number, since it is larger than the sum of its proper divisors (106219).

679838057 is an equidigital number, since it uses as much as digits as its factorization.

679838057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106218.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The square root of 679838057 is about 26073.7043206369. The cubic root of 679838057 is about 879.2961214592.

The spelling of 679838057 in words is "six hundred seventy-nine million, eight hundred thirty-eight thousand, fifty-seven".