679234521 has 24 divisors (see below), whose sum is σ = 1087497984. Its totient is φ = 375611040.

The previous prime is 679234519. The next prime is 679234571. The reversal of 679234521 is 125432976.

It is not a de Polignac number, because 679234521 - 2¹ = 679234519 is a prime.

It is a super-2 number, since 2×679234521² = 922719069036198882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 679234521.

It is not an unprimeable number, because it can be changed into a prime (679234511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69970 + ... + 79083.

It is an arithmetic number, because the mean of its divisors is an integer number (45312416).

Almost surely, 2^679234521 is an apocalyptic number.

It is an amenable number.

679234521 is a deficient number, since it is larger than the sum of its proper divisors (408263463).

679234521 is a wasteful number, since it uses less digits than its factorization.

679234521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149101 (or 149094 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 679234521 is about 26062.1280980660. The cubic root of 679234521 is about 879.0358418344.

The spelling of 679234521 in words is "six hundred seventy-nine million, two hundred thirty-four thousand, five hundred twenty-one".