399019180839 has 4 divisors (see below), whose sum is σ = 532025574456. Its totient is φ = 266012787224.

The previous prime is 399019180831. The next prime is 399019180843. The reversal of 399019180839 is 938081910993.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 399019180839 - 2³ = 399019180831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399019180831) 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, 66503196804 + ... + 66503196809.

It is an arithmetic number, because the mean of its divisors is an integer number (133006393614).

Almost surely, 2^399019180839 is an apocalyptic number.

399019180839 is a deficient number, since it is larger than the sum of its proper divisors (133006393617).

399019180839 is a wasteful number, since it uses less digits than its factorization.

399019180839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133006393616.

The product of its (nonzero) digits is 3779136, while the sum is 60.

The spelling of 399019180839 in words is "three hundred ninety-nine billion, nineteen million, one hundred eighty thousand, eight hundred thirty-nine".