670931 has 2 divisors, whose sum is σ = 670932. Its totient is φ = 670930.

The previous prime is 670919. The next prime is 670951. The reversal of 670931 is 139076.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 670931 - 2⁶ = 670867 is a prime.

It is a super-2 number, since 2×670931² = 900296813522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 670931.

It is not a weakly prime, because it can be changed into another prime (670951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335465 + 335466.

It is an arithmetic number, because the mean of its divisors is an integer number (335466).

2⁶⁷⁰⁹³¹ is an apocalyptic number.

670931 is a deficient number, since it is larger than the sum of its proper divisors (1).

670931 is an equidigital number, since it uses as much as digits as its factorization.

670931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 670931 is about 819.1037785287. The cubic root of 670931 is about 87.5439126522.

The spelling of 670931 in words is "six hundred seventy thousand, nine hundred thirty-one".