679865039 has 4 divisors (see below), whose sum is σ = 776988624. Its totient is φ = 582741456.

The previous prime is 679865029. The next prime is 679865059. The reversal of 679865039 is 930568976.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-679865039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679865029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48561782 + ... + 48561795.

It is an arithmetic number, because the mean of its divisors is an integer number (194247156).

Almost surely, 2^679865039 is an apocalyptic number.

679865039 is a deficient number, since it is larger than the sum of its proper divisors (97123585).

679865039 is an equidigital number, since it uses as much as digits as its factorization.

679865039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97123584.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The square root of 679865039 is about 26074.2217333519. The cubic root of 679865039 is about 879.3077540599.

The spelling of 679865039 in words is "six hundred seventy-nine million, eight hundred sixty-five thousand, thirty-nine".