679946394 has 16 divisors (see below), whose sum is σ = 1360404000. Its totient is φ = 226563600.

The previous prime is 679946389. The next prime is 679946417. The reversal of 679946394 is 493649976.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2769 + ... + 36980.

It is an arithmetic number, because the mean of its divisors is an integer number (85025250).

Almost surely, 2^679946394 is an apocalyptic number.

679946394 is an abundant number, since it is smaller than the sum of its proper divisors (680457606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

679946394 is a wasteful number, since it uses less digits than its factorization.

679946394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42605.

The product of its digits is 8817984, while the sum is 57.

The square root of 679946394 is about 26075.7817524231. The cubic root of 679946394 is about 879.3428263292.

The spelling of 679946394 in words is "six hundred seventy-nine million, nine hundred forty-six thousand, three hundred ninety-four".