679057439 has 2 divisors, whose sum is σ = 679057440. Its totient is φ = 679057438.

The previous prime is 679057381. The next prime is 679057453. The reversal of 679057439 is 934750976.

679057439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-679057439 is a prime.

It is a super-2 number, since 2×679057439² = 922238010922477442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679057039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339528719 + 339528720.

It is an arithmetic number, because the mean of its divisors is an integer number (339528720).

Almost surely, 2^679057439 is an apocalyptic number.

679057439 is a deficient number, since it is larger than the sum of its proper divisors (1).

679057439 is an equidigital number, since it uses as much as digits as its factorization.

679057439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1428840, while the sum is 50.

The square root of 679057439 is about 26058.7305715378. The cubic root of 679057439 is about 878.9594445816.

The spelling of 679057439 in words is "six hundred seventy-nine million, fifty-seven thousand, four hundred thirty-nine".