672379981 has 16 divisors (see below), whose sum is σ = 838028800. Its totient is φ = 525253248.

The previous prime is 672379973. The next prime is 672379991. The reversal of 672379981 is 189973276.

It is not a de Polignac number, because 672379981 - 2³ = 672379973 is a prime.

It is a super-2 number, since 2×672379981² = 904189677699120722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672379921) 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 15 ways as a sum of consecutive naturals, for example, 39576 + ... + 53953.

It is an arithmetic number, because the mean of its divisors is an integer number (52376800).

Almost surely, 2^672379981 is an apocalyptic number.

It is an amenable number.

672379981 is a deficient number, since it is larger than the sum of its proper divisors (165648819).

672379981 is a wasteful number, since it uses less digits than its factorization.

672379981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93628.

The product of its digits is 1143072, while the sum is 52.

The square root of 672379981 is about 25930.2908005290. The cubic root of 672379981 is about 876.0688895352.

The spelling of 672379981 in words is "six hundred seventy-two million, three hundred seventy-nine thousand, nine hundred eighty-one".