398959313 has 4 divisors (see below), whose sum is σ = 399034548. Its totient is φ = 398884080.

The previous prime is 398959303. The next prime is 398959333. The reversal of 398959313 is 313959893.

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

It can be written as a sum of positive squares in 2 ways, for example, as 319980544 + 78978769 = 17888^2 + 8887^2 .

It is a cyclic number.

It is not a de Polignac number, because 398959313 - 2¹⁰ = 398958289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398959303) 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, 29006 + ... + 40487.

It is an arithmetic number, because the mean of its divisors is an integer number (99758637).

Almost surely, 2^398959313 is an apocalyptic number.

It is an amenable number.

398959313 is a deficient number, since it is larger than the sum of its proper divisors (75235).

398959313 is an equidigital number, since it uses as much as digits as its factorization.

398959313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75234.

The product of its digits is 787320, while the sum is 50.

The square root of 398959313 is about 19973.9658806157. The cubic root of 398959313 is about 736.1667574895.

The spelling of 398959313 in words is "three hundred ninety-eight million, nine hundred fifty-nine thousand, three hundred thirteen".