397296521 has 4 divisors (see below), whose sum is σ = 397339152. Its totient is φ = 397253892.

The previous prime is 397296481. The next prime is 397296539. The reversal of 397296521 is 125692793.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 397296521 - 2²² = 393102217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397296541) 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, 671 + ... + 28196.

It is an arithmetic number, because the mean of its divisors is an integer number (99334788).

Almost surely, 2^397296521 is an apocalyptic number.

It is an amenable number.

397296521 is a deficient number, since it is larger than the sum of its proper divisors (42631).

397296521 is a wasteful number, since it uses less digits than its factorization.

397296521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42630.

The product of its digits is 204120, while the sum is 44.

The square root of 397296521 is about 19932.2984374607. The cubic root of 397296521 is about 735.1425956232.

The spelling of 397296521 in words is "three hundred ninety-seven million, two hundred ninety-six thousand, five hundred twenty-one".