13139894 has 8 divisors (see below), whose sum is σ = 19828368. Its totient is φ = 6530440.

The previous prime is 13139891. The next prime is 13139909. The reversal of 13139894 is 49893131.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13139891) 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, 19337 + ... + 20004.

It is an arithmetic number, because the mean of its divisors is an integer number (2478546).

Almost surely, 2^13139894 is an apocalyptic number.

13139894 is a deficient number, since it is larger than the sum of its proper divisors (6688474).

13139894 is a wasteful number, since it uses less digits than its factorization.

13139894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39510.

The product of its digits is 23328, while the sum is 38.

The square root of 13139894 is about 3624.8991710115. The cubic root of 13139894 is about 235.9738911076.

The spelling of 13139894 in words is "thirteen million, one hundred thirty-nine thousand, eight hundred ninety-four".