394164957 has 4 divisors (see below), whose sum is σ = 525553280. Its totient is φ = 262776636.

The previous prime is 394164943. The next prime is 394165001. The reversal of 394164957 is 759461493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 394164957 - 2²⁴ = 377387741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394164917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65694157 + ... + 65694162.

It is an arithmetic number, because the mean of its divisors is an integer number (131388320).

Almost surely, 2^394164957 is an apocalyptic number.

It is an amenable number.

394164957 is a deficient number, since it is larger than the sum of its proper divisors (131388323).

394164957 is a wasteful number, since it uses less digits than its factorization.

394164957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131388322.

The product of its digits is 816480, while the sum is 48.

The square root of 394164957 is about 19853.5880132534. The cubic root of 394164957 is about 733.2059888840.

The spelling of 394164957 in words is "three hundred ninety-four million, one hundred sixty-four thousand, nine hundred fifty-seven".