13213091 has 4 divisors (see below), whose sum is σ = 13221912. Its totient is φ = 13204272.

The previous prime is 13213087. The next prime is 13213093. The reversal of 13213091 is 19031231.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 19031231 = 1013 ⋅18787.

It is a cyclic number.

It is not a de Polignac number, because 13213091 - 2² = 13213087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13213093) 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, 1541 + ... + 5366.

It is an arithmetic number, because the mean of its divisors is an integer number (3305478).

Almost surely, 2^13213091 is an apocalyptic number.

13213091 is a deficient number, since it is larger than the sum of its proper divisors (8821).

13213091 is an equidigital number, since it uses as much as digits as its factorization.

13213091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8820.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 13213091 is about 3634.9815680413. The cubic root of 13213091 is about 236.4112514841.

The spelling of 13213091 in words is "thirteen million, two hundred thirteen thousand, ninety-one".