673664931 has 20 divisors (see below), whose sum is σ = 1059306600. Its totient is φ = 425471616.

The previous prime is 673664923. The next prime is 673664939. The reversal of 673664931 is 139466376.

673664931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (673664923) and next prime (673664939).

It is not a de Polignac number, because 673664931 - 2³ = 673664923 is a prime.

It is a super-2 number, since 2×673664931² = 907648878518469522, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (673664939) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 217326 + ... + 220403.

It is an arithmetic number, because the mean of its divisors is an integer number (52965330).

Almost surely, 2^673664931 is an apocalyptic number.

673664931 is a deficient number, since it is larger than the sum of its proper divisors (385641669).

673664931 is a wasteful number, since it uses less digits than its factorization.

673664931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437760 (or 437751 counting only the distinct ones).

The product of its digits is 489888, while the sum is 45.

The square root of 673664931 is about 25955.0559814461. The cubic root of 673664931 is about 876.6266041311.

The spelling of 673664931 in words is "six hundred seventy-three million, six hundred sixty-four thousand, nine hundred thirty-one".