399213941 has 8 divisors (see below), whose sum is σ = 483082560. Its totient is φ = 322054848.

The previous prime is 399213937. The next prime is 399213943. The reversal of 399213941 is 149312993.

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 399213941 - 2² = 399213937 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 (399213943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1677251 + ... + 1677488.

It is an arithmetic number, because the mean of its divisors is an integer number (60385320).

Almost surely, 2^399213941 is an apocalyptic number.

It is an amenable number.

399213941 is a deficient number, since it is larger than the sum of its proper divisors (83868619).

399213941 is a wasteful number, since it uses less digits than its factorization.

399213941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3354763.

The product of its digits is 52488, while the sum is 41.

The square root of 399213941 is about 19980.3388609903. The cubic root of 399213941 is about 736.3233388740.

The spelling of 399213941 in words is "three hundred ninety-nine million, two hundred thirteen thousand, nine hundred forty-one".