679679542 has 4 divisors (see below), whose sum is σ = 1019519316. Its totient is φ = 339839770.

The previous prime is 679679477. The next prime is 679679563. The reversal of 679679542 is 245976976.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169919884 + ... + 169919887.

It is an arithmetic number, because the mean of its divisors is an integer number (254879829).

Almost surely, 2^679679542 is an apocalyptic number.

679679542 is a deficient number, since it is larger than the sum of its proper divisors (339839774).

679679542 is a wasteful number, since it uses less digits than its factorization.

679679542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339839773.

The product of its digits is 5715360, while the sum is 55.

The square root of 679679542 is about 26070.6643950629. The cubic root of 679679542 is about 879.2277755457.

The spelling of 679679542 in words is "six hundred seventy-nine million, six hundred seventy-nine thousand, five hundred forty-two".