13019091 has 4 divisors (see below), whose sum is σ = 17358792. Its totient is φ = 8679392.

The previous prime is 13019087. The next prime is 13019113. The reversal of 13019091 is 19091031.

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 13019091 - 2² = 13019087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13019021) 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, 2169846 + ... + 2169851.

It is an arithmetic number, because the mean of its divisors is an integer number (4339698).

Almost surely, 2^13019091 is an apocalyptic number.

13019091 is a deficient number, since it is larger than the sum of its proper divisors (4339701).

13019091 is an equidigital number, since it uses as much as digits as its factorization.

13019091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4339700.

The product of its (nonzero) digits is 243, while the sum is 24.

The square root of 13019091 is about 3608.1977495697. The cubic root of 13019091 is about 235.2485133222.

The spelling of 13019091 in words is "thirteen million, nineteen thousand, ninety-one".