2139719 has 4 divisors (see below), whose sum is σ = 2146200. Its totient is φ = 2133240.

The previous prime is 2139691. The next prime is 2139733. The reversal of 2139719 is 9179312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2139719 - 2⁸ = 2139463 is a prime.

It is a super-2 number, since 2×2139719² = 9156794797922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139919) 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, 2717 + ... + 3414.

It is an arithmetic number, because the mean of its divisors is an integer number (536550).

2^2139719 is an apocalyptic number.

2139719 is a deficient number, since it is larger than the sum of its proper divisors (6481).

2139719 is an equidigital number, since it uses as much as digits as its factorization.

2139719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6480.

The product of its digits is 3402, while the sum is 32.

The square root of 2139719 is about 1462.7778368570. Note that the first 3 decimals coincide. The cubic root of 2139719 is about 128.8602336162.

The spelling of 2139719 in words is "two million, one hundred thirty-nine thousand, seven hundred nineteen".