397163121 has 4 divisors (see below), whose sum is σ = 529550832. Its totient is φ = 264775412.

The previous prime is 397163111. The next prime is 397163147. The reversal of 397163121 is 121361793.

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 a cyclic number.

It is not a de Polignac number, because 397163121 - 2⁹ = 397162609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397163101) 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, 66193851 + ... + 66193856.

It is an arithmetic number, because the mean of its divisors is an integer number (132387708).

Almost surely, 2^397163121 is an apocalyptic number.

It is an amenable number.

397163121 is a deficient number, since it is larger than the sum of its proper divisors (132387711).

397163121 is a wasteful number, since it uses less digits than its factorization.

397163121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132387710.

The product of its digits is 6804, while the sum is 33.

The square root of 397163121 is about 19928.9518289347. The cubic root of 397163121 is about 735.0603069587.

The spelling of 397163121 in words is "three hundred ninety-seven million, one hundred sixty-three thousand, one hundred twenty-one".