672994021 has 8 divisors (see below), whose sum is σ = 770337344. Its totient is φ = 575951040.

The previous prime is 672993991. The next prime is 672994027. The reversal of 672994021 is 120499276.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 672994021 - 2¹⁵ = 672961253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672994027) 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 7 ways as a sum of consecutive naturals, for example, 70260 + ... + 79261.

It is an arithmetic number, because the mean of its divisors is an integer number (96292168).

Almost surely, 2^672994021 is an apocalyptic number.

It is an amenable number.

672994021 is a deficient number, since it is larger than the sum of its proper divisors (97343323).

672994021 is a wasteful number, since it uses less digits than its factorization.

672994021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150171.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 672994021 is about 25942.1283051333. The cubic root of 672994021 is about 876.3354935804.

The spelling of 672994021 in words is "six hundred seventy-two million, nine hundred ninety-four thousand, twenty-one".