399073370993 has 24 divisors (see below), whose sum is σ = 439968107040. Its totient is φ = 361706083200.

The previous prime is 399073370987. The next prime is 399073371031.

399073370993 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 399073370993 - 2⁶ = 399073370929 is a prime.

It is a super-2 number, since 2×399073370993² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (399073370953) 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 23 ways as a sum of consecutive naturals, for example, 77053478 + ... + 77058656.

It is an arithmetic number, because the mean of its divisors is an integer number (18332004460).

Almost surely, 2^399073370993 is an apocalyptic number.

It is an amenable number.

399073370993 is a deficient number, since it is larger than the sum of its proper divisors (40894736047).

399073370993 is a wasteful number, since it uses less digits than its factorization.

399073370993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6989 (or 6978 counting only the distinct ones).

The product of its (nonzero) digits is 26040609, while the sum is 62.

The spelling of 399073370993 in words is "three hundred ninety-nine billion, seventy-three million, three hundred seventy thousand, nine hundred ninety-three".