398929974713 has 4 divisors (see below), whose sum is σ = 398969122548. Its totient is φ = 398890826880.

The previous prime is 398929974643. The next prime is 398929974757. The reversal of 398929974713 is 317479929893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 317479929893 = 7 ⋅45354275699.

It can be written as a sum of positive squares in 2 ways, for example, as 335528245504 + 63401729209 = 579248^2 + 251797^2 .

It is a cyclic number.

It is not a de Polignac number, because 398929974713 - 2¹⁶ = 398929909177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (398929974013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19558628 + ... + 19579013.

It is an arithmetic number, because the mean of its divisors is an integer number (99742280637).

Almost surely, 2^398929974713 is an apocalyptic number.

It is an amenable number.

398929974713 is a deficient number, since it is larger than the sum of its proper divisors (39147835).

398929974713 is a wasteful number, since it uses less digits than its factorization.

398929974713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39147834.

The product of its digits is 185177664, while the sum is 71.

The spelling of 398929974713 in words is "three hundred ninety-eight billion, nine hundred twenty-nine million, nine hundred seventy-four thousand, seven hundred thirteen".