397582979 has 4 divisors (see below), whose sum is σ = 397694784. Its totient is φ = 397471176.

The previous prime is 397582973. The next prime is 397582981. The reversal of 397582979 is 979285793.

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

It is a cyclic number.

It is not a de Polignac number, because 397582979 - 2⁴ = 397582963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397582973) 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, 50387 + ... + 57740.

It is an arithmetic number, because the mean of its divisors is an integer number (99423696).

Almost surely, 2^397582979 is an apocalyptic number.

397582979 is a deficient number, since it is larger than the sum of its proper divisors (111805).

397582979 is a wasteful number, since it uses less digits than its factorization.

397582979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111804.

The product of its digits is 8573040, while the sum is 59.

The square root of 397582979 is about 19939.4829170668. The cubic root of 397582979 is about 735.3192368927.

The spelling of 397582979 in words is "three hundred ninety-seven million, five hundred eighty-two thousand, nine hundred seventy-nine".