13138291 has 4 divisors (see below), whose sum is σ = 13829800. Its totient is φ = 12446784.

The previous prime is 13138261. The next prime is 13138303. The reversal of 13138291 is 19283131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13138291 - 2⁵ = 13138259 is a prime.

It is a super-2 number, since 2×13138291² = 345229380801362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13138201) 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 3 ways as a sum of consecutive naturals, for example, 345726 + ... + 345763.

It is an arithmetic number, because the mean of its divisors is an integer number (3457450).

Almost surely, 2^13138291 is an apocalyptic number.

13138291 is a deficient number, since it is larger than the sum of its proper divisors (691509).

13138291 is an equidigital number, since it uses as much as digits as its factorization.

13138291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691508.

The product of its digits is 1296, while the sum is 28.

The square root of 13138291 is about 3624.6780546691. The cubic root of 13138291 is about 235.9642948473.

It can be divided in two parts, 1313 and 8291, that added together give a square (9604 = 98²).

The spelling of 13138291 in words is "thirteen million, one hundred thirty-eight thousand, two hundred ninety-one".