672976521 has 12 divisors (see below), whose sum is σ = 1110945472. Its totient is φ = 384557976.

The previous prime is 672976511. The next prime is 672976543. The reversal of 672976521 is 125679276.

It is not a de Polignac number, because 672976521 - 2²² = 668782217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (672976511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5341021 + ... + 5341146.

Almost surely, 2^672976521 is an apocalyptic number.

It is an amenable number.

672976521 is a deficient number, since it is larger than the sum of its proper divisors (437968951).

672976521 is a wasteful number, since it uses less digits than its factorization.

672976521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10682180 (or 10682177 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 672976521 is about 25941.7910137292. The cubic root of 672976521 is about 876.3278976714.

The spelling of 672976521 in words is "six hundred seventy-two million, nine hundred seventy-six thousand, five hundred twenty-one".