397053881 has 16 divisors (see below), whose sum is σ = 465685248. Its totient is φ = 331627680.

The previous prime is 397053871. The next prime is 397053889. The reversal of 397053881 is 188350793.

It is a happy number.

It is not a de Polignac number, because 397053881 - 2⁶ = 397053817 is a prime.

It is a super-2 number, since 2×397053881² = 315303568834324322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (397053889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 482036 + ... + 482858.

It is an arithmetic number, because the mean of its divisors is an integer number (29105328).

Almost surely, 2^397053881 is an apocalyptic number.

It is an amenable number.

397053881 is a deficient number, since it is larger than the sum of its proper divisors (68631367).

397053881 is an frugal number, since it uses more digits than its factorization.

397053881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953 (or 871 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 397053881 is about 19926.2109042336. The cubic root of 397053881 is about 734.9929078249.

The spelling of 397053881 in words is "three hundred ninety-seven million, fifty-three thousand, eight hundred eighty-one".