13219091 has 4 divisors (see below), whose sum is σ = 13274184. Its totient is φ = 13164000.

The previous prime is 13219069. The next prime is 13219111. The reversal of 13219091 is 19091231.

13219091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19091231 = 61 ⋅312971.

It is a cyclic number.

It is not a de Polignac number, because 13219091 - 2¹⁸ = 12956947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13219091.

It is not an unprimeable number, because it can be changed into a prime (13219061) 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, 27185 + ... + 27666.

It is an arithmetic number, because the mean of its divisors is an integer number (3318546).

Almost surely, 2^13219091 is an apocalyptic number.

13219091 is a deficient number, since it is larger than the sum of its proper divisors (55093).

13219091 is an equidigital number, since it uses as much as digits as its factorization.

13219091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55092.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 13219091 is about 3635.8067880458. The cubic root of 13219091 is about 236.4470304666.

The spelling of 13219091 in words is "thirteen million, two hundred nineteen thousand, ninety-one".