399560615 has 4 divisors (see below), whose sum is σ = 479472744. Its totient is φ = 319648488.

The previous prime is 399560569. The next prime is 399560653. The reversal of 399560615 is 516065993.

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 399560615 - 2¹⁰ = 399559591 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 39956057 + ... + 39956066.

It is an arithmetic number, because the mean of its divisors is an integer number (119868186).

Almost surely, 2^399560615 is an apocalyptic number.

399560615 is a deficient number, since it is larger than the sum of its proper divisors (79912129).

399560615 is an equidigital number, since it uses as much as digits as its factorization.

399560615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79912128.

The product of its (nonzero) digits is 218700, while the sum is 44.

The square root of 399560615 is about 19989.0123567924. The cubic root of 399560615 is about 736.5364161883.

The spelling of 399560615 in words is "three hundred ninety-nine million, five hundred sixty thousand, six hundred fifteen".