397121793 has 16 divisors (see below), whose sum is σ = 558146880. Its totient is φ = 250461504.

The previous prime is 397121779. The next prime is 397121801.

397121793 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 397121793 - 2⁶ = 397121729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397121723) 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, 39555 + ... + 48567.

It is an arithmetic number, because the mean of its divisors is an integer number (34884180).

Almost surely, 2^397121793 is an apocalyptic number.

It is an amenable number.

397121793 is a deficient number, since it is larger than the sum of its proper divisors (161025087).

397121793 is a wasteful number, since it uses less digits than its factorization.

397121793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9808.

The product of its digits is 71442, while the sum is 42.

The square root of 397121793 is about 19927.9149185257. The cubic root of 397121793 is about 735.0348097725.

The spelling of 397121793 in words is "three hundred ninety-seven million, one hundred twenty-one thousand, seven hundred ninety-three".