399092989 has 8 divisors (see below), whose sum is σ = 411130208. Its totient is φ = 387121680.

The previous prime is 399092963. The next prime is 399093001. The reversal of 399092989 is 989290993.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399092989 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 (399092909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4047 + ... + 28540.

It is an arithmetic number, because the mean of its divisors is an integer number (51391276).

Almost surely, 2^399092989 is an apocalyptic number.

It is an amenable number.

399092989 is a deficient number, since it is larger than the sum of its proper divisors (12037219).

399092989 is a wasteful number, since it uses less digits than its factorization.

399092989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32955.

The product of its (nonzero) digits is 2834352, while the sum is 58.

The square root of 399092989 is about 19977.3118562033. The cubic root of 399092989 is about 736.2489687455.

The spelling of 399092989 in words is "three hundred ninety-nine million, ninety-two thousand, nine hundred eighty-nine".