3999339645 has 64 divisors (see below), whose sum is σ = 7523518464. Its totient is φ = 1776395520.

The previous prime is 3999339637. The next prime is 3999339647. The reversal of 3999339645 is 5469339993.

It is not a de Polignac number, because 3999339645 - 2³ = 3999339637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999339647) 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 63 ways as a sum of consecutive naturals, for example, 527854 + ... + 535376.

It is an arithmetic number, because the mean of its divisors is an integer number (117554976).

Almost surely, 2^3999339645 is an apocalyptic number.

3999339645 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3999339645 is a deficient number, since it is larger than the sum of its proper divisors (3524178819).

3999339645 is a wasteful number, since it uses less digits than its factorization.

3999339645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7682.

The product of its digits is 21257640, while the sum is 60.

The square root of 3999339645 is about 63240.3324232250. The cubic root of 3999339645 is about 1587.3136931422.

The spelling of 3999339645 in words is "three billion, nine hundred ninety-nine million, three hundred thirty-nine thousand, six hundred forty-five".