394966931 has 2 divisors, whose sum is σ = 394966932. Its totient is φ = 394966930.

The previous prime is 394966919. The next prime is 394966937. The reversal of 394966931 is 139669493.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394966931 is a prime.

It is a super-2 number, since 2×394966931² = 311997753167117522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 394966931.

It is not a weakly prime, because it can be changed into another prime (394966937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197483465 + 197483466.

It is an arithmetic number, because the mean of its divisors is an integer number (197483466).

Almost surely, 2^394966931 is an apocalyptic number.

394966931 is a deficient number, since it is larger than the sum of its proper divisors (1).

394966931 is an equidigital number, since it uses as much as digits as its factorization.

394966931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 944784, while the sum is 50.

The square root of 394966931 is about 19873.7749559564. The cubic root of 394966931 is about 733.7029160264.

The spelling of 394966931 in words is "three hundred ninety-four million, nine hundred sixty-six thousand, nine hundred thirty-one".