2139718 has 8 divisors (see below), whose sum is σ = 3668112. Its totient is φ = 917016.

The previous prime is 2139691. The next prime is 2139733. The reversal of 2139718 is 8179312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2139718.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76405 + ... + 76432.

It is an arithmetic number, because the mean of its divisors is an integer number (458514).

2^2139718 is an apocalyptic number.

2139718 is a deficient number, since it is larger than the sum of its proper divisors (1528394).

2139718 is a wasteful number, since it uses less digits than its factorization.

2139718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152846.

The product of its digits is 3024, while the sum is 31.

The square root of 2139718 is about 1462.7774950415. Note that the first 3 decimals coincide. The cubic root of 2139718 is about 128.8602135419.

The spelling of 2139718 in words is "two million, one hundred thirty-nine thousand, seven hundred eighteen".