399938141839993 has 4 divisors (see below), whose sum is σ = 399943539262800. Its totient is φ = 399932744417188.

The previous prime is 399938141839967. The next prime is 399938141840011.

399938141839993 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 399938141839993 - 2¹⁷ = 399938141708921 is a prime.

It is a super-2 number, since 2×399938141839993² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399938141839933) 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, 2698600255 + ... + 2698748452.

It is an arithmetic number, because the mean of its divisors is an integer number (99985884815700).

Almost surely, 2^{399938141839993} is an apocalyptic number.

It is an amenable number.

399938141839993 is a deficient number, since it is larger than the sum of its proper divisors (5397422807).

399938141839993 is an equidigital number, since it uses as much as digits as its factorization.

399938141839993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5397422806.

The product of its digits is 11019960576, while the sum is 88.

The spelling of 399938141839993 in words is "three hundred ninety-nine trillion, nine hundred thirty-eight billion, one hundred forty-one million, eight hundred thirty-nine thousand, nine hundred ninety-three".