394734931 has 2 divisors, whose sum is σ = 394734932. Its totient is φ = 394734930.

The previous prime is 394734919. The next prime is 394734941. The reversal of 394734931 is 139437493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394734931 - 2¹⁵ = 394702163 is a prime.

It is a super-2 number, since 2×394734931² = 311631331503149522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (394734911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197367465 + 197367466.

It is an arithmetic number, because the mean of its divisors is an integer number (197367466).

Almost surely, 2^394734931 is an apocalyptic number.

394734931 is a deficient number, since it is larger than the sum of its proper divisors (1).

394734931 is an equidigital number, since it uses as much as digits as its factorization.

394734931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 43.

The square root of 394734931 is about 19867.9372608230. The cubic root of 394734931 is about 733.5592310725.

The spelling of 394734931 in words is "three hundred ninety-four million, seven hundred thirty-four thousand, nine hundred thirty-one".