399754079 has 8 divisors (see below), whose sum is σ = 403942560. Its totient is φ = 395587296.

The previous prime is 399754027. The next prime is 399754109. The reversal of 399754079 is 970457993.

It is a happy number.

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-399754079 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 399754079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399754279) 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, 33017 + ... + 43469.

It is an arithmetic number, because the mean of its divisors is an integer number (50492820).

Almost surely, 2^399754079 is an apocalyptic number.

399754079 is a deficient number, since it is larger than the sum of its proper divisors (4188481).

399754079 is a wasteful number, since it uses less digits than its factorization.

399754079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10849.

The product of its (nonzero) digits is 2143260, while the sum is 53.

The square root of 399754079 is about 19993.8510297541. The cubic root of 399754079 is about 736.6552719881.

The spelling of 399754079 in words is "three hundred ninety-nine million, seven hundred fifty-four thousand, seventy-nine".