679734881 has 32 divisors (see below), whose sum is σ = 817152000. Its totient is φ = 553355712.

The previous prime is 679734863. The next prime is 679734883. The reversal of 679734881 is 188437976.

It is a de Polignac number, because none of the positive numbers 2^k-679734881 is a prime.

It is a super-2 number, since 2×679734881² = 924079016896168322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (679734883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2843960 + ... + 2844198.

It is an arithmetic number, because the mean of its divisors is an integer number (25536000).

Almost surely, 2^679734881 is an apocalyptic number.

It is an amenable number.

679734881 is a deficient number, since it is larger than the sum of its proper divisors (137417119).

679734881 is a wasteful number, since it uses less digits than its factorization.

679734881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501.

The product of its digits is 2032128, while the sum is 53.

The square root of 679734881 is about 26071.7257004595. The cubic root of 679734881 is about 879.2516369207.

The spelling of 679734881 in words is "six hundred seventy-nine million, seven hundred thirty-four thousand, eight hundred eighty-one".