399768933 has 8 divisors (see below), whose sum is σ = 534001888. Its totient is φ = 266024304.

The previous prime is 399768917. The next prime is 399768947. The reversal of 399768933 is 339867993.

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

It is not a de Polignac number, because 399768933 - 2⁴ = 399768917 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 (399768133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120166 + ... + 123447.

It is an arithmetic number, because the mean of its divisors is an integer number (66750236).

Almost surely, 2^399768933 is an apocalyptic number.

It is an amenable number.

399768933 is a deficient number, since it is larger than the sum of its proper divisors (134232955).

399768933 is a wasteful number, since it uses less digits than its factorization.

399768933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244163.

The product of its digits is 6613488, while the sum is 57.

The square root of 399768933 is about 19994.2224905096. Note that the first 3 decimals coincide. The cubic root of 399768933 is about 736.6643960491.

The spelling of 399768933 in words is "three hundred ninety-nine million, seven hundred sixty-eight thousand, nine hundred thirty-three".