672520731 has 32 divisors (see below), whose sum is σ = 975110400. Its totient is φ = 410640384.

The previous prime is 672520729. The next prime is 672520747. The reversal of 672520731 is 137025276.

It is not a de Polignac number, because 672520731 - 2¹ = 672520729 is a prime.

It is a super-3 number, since 3×672520731³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 672520692 and 672520701.

It is not an unprimeable number, because it can be changed into a prime (672520711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 984316 + ... + 984998.

It is an arithmetic number, because the mean of its divisors is an integer number (30472200).

Almost surely, 2^672520731 is an apocalyptic number.

672520731 is a deficient number, since it is larger than the sum of its proper divisors (302589669).

672520731 is a wasteful number, since it uses less digits than its factorization.

672520731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195.

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 672520731 is about 25933.0046658693. The cubic root of 672520731 is about 876.1300147405.

The spelling of 672520731 in words is "six hundred seventy-two million, five hundred twenty thousand, seven hundred thirty-one".