13940139 has 8 divisors (see below), whose sum is σ = 19395072. Its totient is φ = 8889320.

The previous prime is 13940117. The next prime is 13940177. The reversal of 13940139 is 93104931.

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

It is a cyclic number.

It is not a de Polignac number, because 13940139 - 2⁷ = 13940011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13940189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100947 + ... + 101084.

It is an arithmetic number, because the mean of its divisors is an integer number (2424384).

Almost surely, 2^13940139 is an apocalyptic number.

13940139 is a deficient number, since it is larger than the sum of its proper divisors (5454933).

13940139 is a wasteful number, since it uses less digits than its factorization.

13940139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202057.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 13940139 is about 3733.6495550600. The cubic root of 13940139 is about 240.6702272664.

The spelling of 13940139 in words is "thirteen million, nine hundred forty thousand, one hundred thirty-nine".