13138719 has 8 divisors (see below), whose sum is σ = 19110912. Its totient is φ = 7962840.

The previous prime is 13138703. The next prime is 13138721. The reversal of 13138719 is 91783131.

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

It is not a de Polignac number, because 13138719 - 2⁴ = 13138703 is a prime.

It is a super-2 number, since 2×13138719² = 345251873921922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 398143 = 13138719 / (1 + 3 + 1 + 3 + 8 + 7 + 1 + 9).

It is a self number, because there is not a number n which added to its sum of digits gives 13138719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13138789) 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, 199039 + ... + 199104.

It is an arithmetic number, because the mean of its divisors is an integer number (2388864).

Almost surely, 2^13138719 is an apocalyptic number.

13138719 is a deficient number, since it is larger than the sum of its proper divisors (5972193).

13138719 is a wasteful number, since it uses less digits than its factorization.

13138719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398157.

The product of its digits is 4536, while the sum is 33.

The square root of 13138719 is about 3624.7370939145. The cubic root of 13138719 is about 235.9668571192.

The spelling of 13138719 in words is "thirteen million, one hundred thirty-eight thousand, seven hundred nineteen".