672493209 has 16 divisors (see below), whose sum is σ = 928324800. Its totient is φ = 432520256.

The previous prime is 672493189. The next prime is 672493223. The reversal of 672493209 is 902394276.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 672493209 - 2²⁵ = 638938777 is a prime.

It is a super-2 number, since 2×672493209² = 904494232302235362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (672493909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146422 + ... + 150944.

It is an arithmetic number, because the mean of its divisors is an integer number (58020300).

Almost surely, 2^672493209 is an apocalyptic number.

It is an amenable number.

672493209 is a deficient number, since it is larger than the sum of its proper divisors (255831591).

672493209 is a wasteful number, since it uses less digits than its factorization.

672493209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6264.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 672493209 is about 25932.4740238952. The cubic root of 672493209 is about 876.1180630994.

The spelling of 672493209 in words is "six hundred seventy-two million, four hundred ninety-three thousand, two hundred nine".