399392929 has 16 divisors (see below), whose sum is σ = 440294400. Its totient is φ = 360049536.

The previous prime is 399392927. The next prime is 399392947. The reversal of 399392929 is 929293993.

It is a cyclic number.

It is not a de Polignac number, because 399392929 - 2¹ = 399392927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 399392929.

It is not an unprimeable number, because it can be changed into a prime (399392923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93952 + ... + 98110.

It is an arithmetic number, because the mean of its divisors is an integer number (27518400).

Almost surely, 2^399392929 is an apocalyptic number.

It is an amenable number.

399392929 is a deficient number, since it is larger than the sum of its proper divisors (40901471).

399392929 is a wasteful number, since it uses less digits than its factorization.

399392929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4344.

The product of its digits is 2125764, while the sum is 55.

The square root of 399392929 is about 19984.8174622637. The cubic root of 399392929 is about 736.4333662191.

The spelling of 399392929 in words is "three hundred ninety-nine million, three hundred ninety-two thousand, nine hundred twenty-nine".