397429715 has 4 divisors (see below), whose sum is σ = 476915664. Its totient is φ = 317943768.

The previous prime is 397429679. The next prime is 397429733. The reversal of 397429715 is 517924793.

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 397429715 - 2²² = 393235411 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 397429715.

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, 39742967 + ... + 39742976.

It is an arithmetic number, because the mean of its divisors is an integer number (119228916).

Almost surely, 2^397429715 is an apocalyptic number.

397429715 is a deficient number, since it is larger than the sum of its proper divisors (79485949).

397429715 is an equidigital number, since it uses as much as digits as its factorization.

397429715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79485948.

The product of its digits is 476280, while the sum is 47.

The square root of 397429715 is about 19935.6393175639. The cubic root of 397429715 is about 735.2247388400.

The spelling of 397429715 in words is "three hundred ninety-seven million, four hundred twenty-nine thousand, seven hundred fifteen".