13191019 has 4 divisors (see below), whose sum is σ = 13376880. Its totient is φ = 13005160.

The previous prime is 13190999. The next prime is 13191037. The reversal of 13191019 is 91019131.

13191019 is digitally balanced in base 3, 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.

It is a cyclic number.

It is not a de Polignac number, because 13191019 - 2⁵ = 13190987 is a prime.

It is a super-2 number, since 2×13191019² = 348005964516722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13190984 and 13191002.

It is not an unprimeable number, because it can be changed into a prime (13191419) 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, 92824 + ... + 92965.

It is an arithmetic number, because the mean of its divisors is an integer number (3344220).

Almost surely, 2^13191019 is an apocalyptic number.

13191019 is a deficient number, since it is larger than the sum of its proper divisors (185861).

13191019 is an equidigital number, since it uses as much as digits as its factorization.

13191019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185860.

The product of its (nonzero) digits is 243, while the sum is 25.

The square root of 13191019 is about 3631.9442451668. The cubic root of 13191019 is about 236.2795392457.

The spelling of 13191019 in words is "thirteen million, one hundred ninety-one thousand, nineteen".