398599717 has 4 divisors (see below), whose sum is σ = 402325056. Its totient is φ = 394874380.

The previous prime is 398599687. The next prime is 398599739. The reversal of 398599717 is 717995893.

It is a happy number.

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 398599717 - 2⁷ = 398599589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398599757) 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, 1862509 + ... + 1862722.

It is an arithmetic number, because the mean of its divisors is an integer number (100581264).

Almost surely, 2^398599717 is an apocalyptic number.

It is an amenable number.

398599717 is a deficient number, since it is larger than the sum of its proper divisors (3725339).

398599717 is a wasteful number, since it uses less digits than its factorization.

398599717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3725338.

The product of its digits is 4286520, while the sum is 58.

The square root of 398599717 is about 19964.9622338736. The cubic root of 398599717 is about 735.9455133784.

The spelling of 398599717 in words is "three hundred ninety-eight million, five hundred ninety-nine thousand, seven hundred seventeen".