394695677 has 2 divisors, whose sum is σ = 394695678. Its totient is φ = 394695676.

The previous prime is 394695629. The next prime is 394695701. The reversal of 394695677 is 776596493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 391287961 + 3407716 = 19781^2 + 1846^2 .

It is a cyclic number.

It is not a de Polignac number, because 394695677 - 2⁸ = 394695421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394695877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197347838 + 197347839.

It is an arithmetic number, because the mean of its divisors is an integer number (197347839).

Almost surely, 2^394695677 is an apocalyptic number.

It is an amenable number.

394695677 is a deficient number, since it is larger than the sum of its proper divisors (1).

394695677 is an equidigital number, since it uses as much as digits as its factorization.

394695677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8573040, while the sum is 56.

The square root of 394695677 is about 19866.9493632012. The cubic root of 394695677 is about 733.5349142578.

The spelling of 394695677 in words is "three hundred ninety-four million, six hundred ninety-five thousand, six hundred seventy-seven".