398739937893 has 16 divisors (see below), whose sum is σ = 580459654656. Its totient is φ = 241462947440.

The previous prime is 398739937891. The next prime is 398739937901.

398739937893 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 398739937893 - 2¹ = 398739937891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398739937891) 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 15 ways as a sum of consecutive naturals, for example, 4899555 + ... + 4980272.

It is an arithmetic number, because the mean of its divisors is an integer number (36278728416).

Almost surely, 2^398739937893 is an apocalyptic number.

398739937893 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

398739937893 is a deficient number, since it is larger than the sum of its proper divisors (181719716763).

398739937893 is a wasteful number, since it uses less digits than its factorization.

398739937893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9881064.

The product of its digits is 1666598976, while the sum is 78.

The spelling of 398739937893 in words is "three hundred ninety-eight billion, seven hundred thirty-nine million, nine hundred thirty-seven thousand, eight hundred ninety-three".