399071075 has 12 divisors (see below), whose sum is σ = 532913808. Its totient is φ = 294698400.

The previous prime is 399071069. The next prime is 399071083. The reversal of 399071075 is 570170993.

It is not a de Polignac number, because 399071075 - 2¹² = 399066979 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 613631 + ... + 614280.

It is an arithmetic number, because the mean of its divisors is an integer number (44409484).

Almost surely, 2^399071075 is an apocalyptic number.

399071075 is a deficient number, since it is larger than the sum of its proper divisors (133842733).

399071075 is a wasteful number, since it uses less digits than its factorization.

399071075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227934 (or 1227929 counting only the distinct ones).

The product of its (nonzero) digits is 59535, while the sum is 41.

The square root of 399071075 is about 19976.7633764832. The cubic root of 399071075 is about 736.2354928091.

The spelling of 399071075 in words is "three hundred ninety-nine million, seventy-one thousand, seventy-five".