670071931 has 4 divisors (see below), whose sum is σ = 670183200. Its totient is φ = 669960664.

The previous prime is 670071929. The next prime is 670071971. The reversal of 670071931 is 139170076.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 670071931 - 2¹ = 670071929 is a prime.

It is a super-2 number, since 2×670071931² = 897992785428137522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670071911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46051 + ... + 58828.

It is an arithmetic number, because the mean of its divisors is an integer number (167545800).

Almost surely, 2^670071931 is an apocalyptic number.

670071931 is a deficient number, since it is larger than the sum of its proper divisors (111269).

670071931 is a wasteful number, since it uses less digits than its factorization.

670071931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111268.

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 670071931 is about 25885.7476422838. The cubic root of 670071931 is about 875.0653256262.

The spelling of 670071931 in words is "six hundred seventy million, seventy-one thousand, nine hundred thirty-one".