399133879877 has 8 divisors (see below), whose sum is σ = 402704252160. Its totient is φ = 395564178240.

The previous prime is 399133879861. The next prime is 399133879897. The reversal of 399133879877 is 778978331993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 399133879877 - 2⁴ = 399133879861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399133879897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1068524 + ... + 1392842.

It is an arithmetic number, because the mean of its divisors is an integer number (50338031520).

Almost surely, 2^399133879877 is an apocalyptic number.

It is an amenable number.

399133879877 is a deficient number, since it is larger than the sum of its proper divisors (3570372283).

399133879877 is a wasteful number, since it uses less digits than its factorization.

399133879877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335323.

The product of its digits is 432081216, while the sum is 74.

The spelling of 399133879877 in words is "three hundred ninety-nine billion, one hundred thirty-three million, eight hundred seventy-nine thousand, eight hundred seventy-seven".