3999369 has 16 divisors (see below), whose sum is σ = 6160320. Its totient is φ = 2280960.

The previous prime is 3999337. The next prime is 3999379. The reversal of 3999369 is 9639993.

It is not a de Polignac number, because 3999369 - 2⁵ = 3999337 is a prime.

It is a super-3 number, since 3×3999369³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

3999369 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3999379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3004 + ... + 4125.

It is an arithmetic number, because the mean of its divisors is an integer number (385020).

Almost surely, 2^3999369 is an apocalyptic number.

It is an amenable number.

3999369 is a deficient number, since it is larger than the sum of its proper divisors (2160951).

3999369 is a wasteful number, since it uses less digits than its factorization.

3999369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7160.

The product of its digits is 354294, while the sum is 48.

The square root of 3999369 is about 1999.8422437782. The cubic root of 3999369 is about 158.7317576740.

The spelling of 3999369 in words is "three million, nine hundred ninety-nine thousand, three hundred sixty-nine".