671650731 has 16 divisors (see below), whose sum is σ = 995813920. Its totient is φ = 447418080.

The previous prime is 671650729. The next prime is 671650747. The reversal of 671650731 is 137056176.

It is not a de Polignac number, because 671650731 - 2¹ = 671650729 is a prime.

It is a super-2 number, since 2×671650731² = 902229408905668722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671657731) 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, 28281 + ... + 46293.

It is an arithmetic number, because the mean of its divisors is an integer number (62238370).

Almost surely, 2^671650731 is an apocalyptic number.

671650731 is a deficient number, since it is larger than the sum of its proper divisors (324163189).

671650731 is a wasteful number, since it uses less digits than its factorization.

671650731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19403 (or 19397 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 671650731 is about 25916.2252459728. The cubic root of 671650731 is about 875.7520526449.

The spelling of 671650731 in words is "six hundred seventy-one million, six hundred fifty thousand, seven hundred thirty-one".