399106085 has 16 divisors (see below), whose sum is σ = 548743296. Its totient is φ = 272973888.

The previous prime is 399106063. The next prime is 399106109. The reversal of 399106085 is 580601993.

It is a cyclic number.

It is not a de Polignac number, because 399106085 - 2⁶ = 399106021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 467 + ... + 28256.

It is an arithmetic number, because the mean of its divisors is an integer number (34296456).

Almost surely, 2^399106085 is an apocalyptic number.

399106085 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

399106085 is a deficient number, since it is larger than the sum of its proper divisors (149637211).

399106085 is a wasteful number, since it uses less digits than its factorization.

399106085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29132.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 399106085 is about 19977.6396253411. The cubic root of 399106085 is about 736.2570218487.

The spelling of 399106085 in words is "three hundred ninety-nine million, one hundred six thousand, eighty-five".