399739937993 has 16 divisors (see below), whose sum is σ = 446540688000. Its totient is φ = 354751562880.

The previous prime is 399739937929. The next prime is 399739937999.

399739937993 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 399739937993 - 2⁶ = 399739937929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399739937999) 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, 1606748 + ... + 1838781.

It is an arithmetic number, because the mean of its divisors is an integer number (27908793000).

Almost surely, 2^399739937993 is an apocalyptic number.

It is an amenable number.

399739937993 is a deficient number, since it is larger than the sum of its proper divisors (46800750007).

399739937993 is a wasteful number, since it uses less digits than its factorization.

399739937993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3445792.

The product of its digits is 2109289329, while the sum is 80.

The spelling of 399739937993 in words is "three hundred ninety-nine billion, seven hundred thirty-nine million, nine hundred thirty-seven thousand, nine hundred ninety-three".