397634317 has 4 divisors (see below), whose sum is σ = 397970496. Its totient is φ = 397298140.

The previous prime is 397634309. The next prime is 397634323. The reversal of 397634317 is 713436793.

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, and also an emirpimes, since its reverse is a distinct semiprime: 713436793 = 23 ⋅31018991.

It is a cyclic number.

It is not a de Polignac number, because 397634317 - 2³ = 397634309 is a prime.

It is a super-2 number, since 2×397634317² = 316226100112112978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397634917) 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 in 3 ways as a sum of consecutive naturals, for example, 166309 + ... + 168682.

It is an arithmetic number, because the mean of its divisors is an integer number (99492624).

Almost surely, 2^397634317 is an apocalyptic number.

It is an amenable number.

397634317 is a deficient number, since it is larger than the sum of its proper divisors (336179).

397634317 is a wasteful number, since it uses less digits than its factorization.

397634317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336178.

The product of its digits is 285768, while the sum is 43.

The square root of 397634317 is about 19940.7702208315. The cubic root of 397634317 is about 735.3508849564.

The spelling of 397634317 in words is "three hundred ninety-seven million, six hundred thirty-four thousand, three hundred seventeen".