670450931 has 2 divisors, whose sum is σ = 670450932. Its totient is φ = 670450930.

The previous prime is 670450903. The next prime is 670450933. The reversal of 670450931 is 139054076.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 670450931 - 2⁶ = 670450867 is a prime.

It is a super-2 number, since 2×670450931² = 899008901757533522, which contains 22 as substring.

Together with 670450933, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 670450891 and 670450900.

It is not a weakly prime, because it can be changed into another prime (670450933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335225465 + 335225466.

It is an arithmetic number, because the mean of its divisors is an integer number (335225466).

Almost surely, 2^670450931 is an apocalyptic number.

670450931 is a deficient number, since it is larger than the sum of its proper divisors (1).

670450931 is an equidigital number, since it uses as much as digits as its factorization.

670450931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 670450931 is about 25893.0672381624. The cubic root of 670450931 is about 875.2302766981.

The spelling of 670450931 in words is "six hundred seventy million, four hundred fifty thousand, nine hundred thirty-one".