398223457913 has 8 divisors (see below), whose sum is σ = 422193851208. Its totient is φ = 374313673984.

The previous prime is 398223457909. The next prime is 398223457939. The reversal of 398223457913 is 319754322893.

It can be written as a sum of positive squares in 4 ways, for example, as 482593024 + 397740864889 = 21968^2 + 630667^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 398223457913 - 2² = 398223457909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398223457963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15138806 + ... + 15165087.

It is an arithmetic number, because the mean of its divisors is an integer number (52774231401).

Almost surely, 2^398223457913 is an apocalyptic number.

It is an amenable number.

398223457913 is a deficient number, since it is larger than the sum of its proper divisors (23970393295).

398223457913 is a wasteful number, since it uses less digits than its factorization.

398223457913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30304683.

The product of its digits is 9797760, while the sum is 56.

The spelling of 398223457913 in words is "three hundred ninety-eight billion, two hundred twenty-three million, four hundred fifty-seven thousand, nine hundred thirteen".