399475605 has 16 divisors (see below), whose sum is σ = 676759104. Its totient is φ = 200520960.

The previous prime is 399475591. The next prime is 399475621. The reversal of 399475605 is 506574993.

It is not a de Polignac number, because 399475605 - 2⁶ = 399475541 is a prime.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 783031 + ... + 783540.

It is an arithmetic number, because the mean of its divisors is an integer number (42297444).

Almost surely, 2^399475605 is an apocalyptic number.

It is an amenable number.

399475605 is a deficient number, since it is larger than the sum of its proper divisors (277283499).

399475605 is a wasteful number, since it uses less digits than its factorization.

399475605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566596.

The product of its (nonzero) digits is 1020600, while the sum is 48.

The square root of 399475605 is about 19986.8858254607. The cubic root of 399475605 is about 736.4841776381.

The spelling of 399475605 in words is "three hundred ninety-nine million, four hundred seventy-five thousand, six hundred five".