3139999 has 4 divisors (see below), whose sum is σ = 3143664. Its totient is φ = 3136336.

The previous prime is 3139993. The next prime is 3140041. The reversal of 3139999 is 9999313.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9999313 = 1087 ⋅9199.

It is a cyclic number.

It is not a de Polignac number, because 3139999 - 2³ = 3139991 is a prime.

It is a Duffinian number.

3139999 is a modest number, since divided by 9999 gives 313 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3139991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219 + ... + 2515.

It is an arithmetic number, because the mean of its divisors is an integer number (785916).

Almost surely, 2^3139999 is an apocalyptic number.

3139999 is a deficient number, since it is larger than the sum of its proper divisors (3665).

3139999 is a wasteful number, since it uses less digits than its factorization.

3139999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3664.

The product of its digits is 59049, while the sum is 43.

The square root of 3139999 is about 1772.0042325006. The cubic root of 3139999 is about 146.4344195053.

The spelling of 3139999 in words is "three million, one hundred thirty-nine thousand, nine hundred ninety-nine".