679880990 has 32 divisors (see below), whose sum is σ = 1309335840. Its totient is φ = 253411200.

The previous prime is 679880947. The next prime is 679881001. The reversal of 679880990 is 99088976.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17741 + ... + 40920.

It is an arithmetic number, because the mean of its divisors is an integer number (40916745).

Almost surely, 2^679880990 is an apocalyptic number.

679880990 is a deficient number, since it is larger than the sum of its proper divisors (629454850).

679880990 is a wasteful number, since it uses less digits than its factorization.

679880990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58748.

The product of its (nonzero) digits is 1959552, while the sum is 56.

The square root of 679880990 is about 26074.5276083767. The cubic root of 679880990 is about 879.3146307818.

The spelling of 679880990 in words is "six hundred seventy-nine million, eight hundred eighty thousand, nine hundred ninety".