399124617 has 4 divisors (see below), whose sum is σ = 532166160. Its totient is φ = 266083076.

The previous prime is 399124613. The next prime is 399124619. The reversal of 399124617 is 716421993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 399124617 - 2² = 399124613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399124613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66520767 + ... + 66520772.

It is an arithmetic number, because the mean of its divisors is an integer number (133041540).

Almost surely, 2^399124617 is an apocalyptic number.

It is an amenable number.

399124617 is a deficient number, since it is larger than the sum of its proper divisors (133041543).

399124617 is a wasteful number, since it uses less digits than its factorization.

399124617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133041542.

The product of its digits is 81648, while the sum is 42.

The square root of 399124617 is about 19978.1034385149. The cubic root of 399124617 is about 736.2684174019.

The spelling of 399124617 in words is "three hundred ninety-nine million, one hundred twenty-four thousand, six hundred seventeen".