398597795893 has 4 divisors (see below), whose sum is σ = 434833959168. Its totient is φ = 362361632620.

The previous prime is 398597795863. The next prime is 398597795903.

398597795893 is nontrivially palindromic in base 10.

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 398597795893 - 2⁹ = 398597795381 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 (398597795863) 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, 18118081621 + ... + 18118081642.

It is an arithmetic number, because the mean of its divisors is an integer number (108708489792).

Almost surely, 2^398597795893 is an apocalyptic number.

It is an amenable number.

398597795893 is a deficient number, since it is larger than the sum of its proper divisors (36236163275).

398597795893 is a wasteful number, since it uses less digits than its factorization.

398597795893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36236163274.

The product of its digits is 4629441600, while the sum is 82.

The spelling of 398597795893 in words is "three hundred ninety-eight billion, five hundred ninety-seven million, seven hundred ninety-five thousand, eight hundred ninety-three".