394312997 has 12 divisors (see below), whose sum is σ = 432137664. Its totient is φ = 359583120.

The previous prime is 394312991. The next prime is 394312999. The reversal of 394312997 is 799213493.

It is a happy number.

It is not a de Polignac number, because 394312997 - 2¹⁶ = 394247461 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 (394312991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29 + ... + 28082.

It is an arithmetic number, because the mean of its divisors is an integer number (36011472).

Almost surely, 2^394312997 is an apocalyptic number.

It is an amenable number.

394312997 is a deficient number, since it is larger than the sum of its proper divisors (37824667).

394312997 is a wasteful number, since it uses less digits than its factorization.

394312997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28220 (or 28207 counting only the distinct ones).

The product of its digits is 367416, while the sum is 47.

The square root of 394312997 is about 19857.3159565939. The cubic root of 394312997 is about 733.2977696022.

The spelling of 394312997 in words is "three hundred ninety-four million, three hundred twelve thousand, nine hundred ninety-seven".