13187291 has 8 divisors (see below), whose sum is σ = 15037344. Its totient is φ = 11456640.

The previous prime is 13187263. The next prime is 13187309. The reversal of 13187291 is 19278131.

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

It is not a de Polignac number, because 13187291 - 2⁶ = 13187227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13187201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29615 + ... + 30056.

It is an arithmetic number, because the mean of its divisors is an integer number (1879668).

Almost surely, 2^13187291 is an apocalyptic number.

13187291 is a deficient number, since it is larger than the sum of its proper divisors (1850053).

13187291 is a wasteful number, since it uses less digits than its factorization.

13187291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59701.

The product of its digits is 3024, while the sum is 32.

The square root of 13187291 is about 3631.4309851627. The cubic root of 13187291 is about 236.2572783141.

The spelling of 13187291 in words is "thirteen million, one hundred eighty-seven thousand, two hundred ninety-one".