399017498431 has 4 divisors (see below), whose sum is σ = 403500841200. Its totient is φ = 394534155664.

The previous prime is 399017498377. The next prime is 399017498437. The reversal of 399017498431 is 134894710993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134894710993 = 7 ⋅19270672999.

It is a cyclic number.

It is not a de Polignac number, because 399017498431 - 2⁷ = 399017498303 is a prime.

It is a super-2 number, since 2×399017498431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399017498437) 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, 2241671251 + ... + 2241671428.

It is an arithmetic number, because the mean of its divisors is an integer number (100875210300).

Almost surely, 2^399017498431 is an apocalyptic number.

399017498431 is a deficient number, since it is larger than the sum of its proper divisors (4483342769).

399017498431 is an equidigital number, since it uses as much as digits as its factorization.

399017498431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4483342768.

The product of its (nonzero) digits is 5878656, while the sum is 58.

The spelling of 399017498431 in words is "three hundred ninety-nine billion, seventeen million, four hundred ninety-eight thousand, four hundred thirty-one".