397330887 has 4 divisors (see below), whose sum is σ = 529774520. Its totient is φ = 264887256.

The previous prime is 397330873. The next prime is 397330889. The reversal of 397330887 is 788033793.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 397330887 - 2⁶ = 397330823 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 (397330889) 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, 66221812 + ... + 66221817.

It is an arithmetic number, because the mean of its divisors is an integer number (132443630).

Almost surely, 2^397330887 is an apocalyptic number.

397330887 is a deficient number, since it is larger than the sum of its proper divisors (132443633).

397330887 is a wasteful number, since it uses less digits than its factorization.

397330887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132443632.

The product of its (nonzero) digits is 762048, while the sum is 48.

The square root of 397330887 is about 19933.1604869875. The cubic root of 397330887 is about 735.1637915317.

The spelling of 397330887 in words is "three hundred ninety-seven million, three hundred thirty thousand, eight hundred eighty-seven".