399877133 has 4 divisors (see below), whose sum is σ = 401670528. Its totient is φ = 398083740.

The previous prime is 399877129. The next prime is 399877139. The reversal of 399877133 is 331778993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 399877133 - 2² = 399877129 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 (399877139) 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, 896363 + ... + 896808.

It is an arithmetic number, because the mean of its divisors is an integer number (100417632).

Almost surely, 2^399877133 is an apocalyptic number.

It is an amenable number.

399877133 is a deficient number, since it is larger than the sum of its proper divisors (1793395).

399877133 is a wasteful number, since it uses less digits than its factorization.

399877133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793394.

The product of its digits is 857304, while the sum is 50.

The square root of 399877133 is about 19996.9280890841. The cubic root of 399877133 is about 736.7308510194.

The spelling of 399877133 in words is "three hundred ninety-nine million, eight hundred seventy-seven thousand, one hundred thirty-three".