397582345 has 4 divisors (see below), whose sum is σ = 477098820. Its totient is φ = 318065872.

The previous prime is 397582337. The next prime is 397582363. The reversal of 397582345 is 543285793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543285793 = 41 ⋅13250873.

It can be written as a sum of positive squares in 2 ways, for example, as 187361344 + 210221001 = 13688^2 + 14499^2 .

It is a cyclic number.

It is not a de Polignac number, because 397582345 - 2³ = 397582337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 397582295 and 397582304.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39758230 + ... + 39758239.

It is an arithmetic number, because the mean of its divisors is an integer number (119274705).

Almost surely, 2^397582345 is an apocalyptic number.

It is an amenable number.

397582345 is a deficient number, since it is larger than the sum of its proper divisors (79516475).

397582345 is an equidigital number, since it uses as much as digits as its factorization.

397582345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79516474.

The product of its digits is 907200, while the sum is 46.

The square root of 397582345 is about 19939.4670189551. The cubic root of 397582345 is about 735.3188460371.

It can be divided in two parts, 3975 and 82345, that added together give a triangular number (86320 = T₄₁₅).

The spelling of 397582345 in words is "three hundred ninety-seven million, five hundred eighty-two thousand, three hundred forty-five".