397372385 has 4 divisors (see below), whose sum is σ = 476846868. Its totient is φ = 317897904.

The previous prime is 397372379. The next prime is 397372463. The reversal of 397372385 is 583273793.

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

It can be written as a sum of positive squares in 2 ways, for example, as 80496784 + 316875601 = 8972^2 + 17801^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397372385 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39737234 + ... + 39737243.

It is an arithmetic number, because the mean of its divisors is an integer number (119211717).

Almost surely, 2^397372385 is an apocalyptic number.

It is an amenable number.

397372385 is a deficient number, since it is larger than the sum of its proper divisors (79474483).

397372385 is an equidigital number, since it uses as much as digits as its factorization.

397372385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79474482.

The product of its digits is 952560, while the sum is 47.

The square root of 397372385 is about 19934.2013885683. The cubic root of 397372385 is about 735.1893846129.

The spelling of 397372385 in words is "three hundred ninety-seven million, three hundred seventy-two thousand, three hundred eighty-five".