13019909 has 32 divisors (see below), whose sum is σ = 16920576. Its totient is φ = 9757440.

The previous prime is 13019887. The next prime is 13019917. The reversal of 13019909 is 90991031.

13019909 is a nontrivial binomial coefficient, being equal to C(71, 5).

It is a de Polignac number, because none of the positive numbers 2^k-13019909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13019989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183344 + ... + 183414.

It is an arithmetic number, because the mean of its divisors is an integer number (528768).

Almost surely, 2^13019909 is an apocalyptic number.

It is an amenable number.

13019909 is a deficient number, since it is larger than the sum of its proper divisors (3900667).

13019909 is a wasteful number, since it uses less digits than its factorization.

13019909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185.

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 13019909 is about 3608.3111007783. The cubic root of 13019909 is about 235.2534401703.

The spelling of 13019909 in words is "thirteen million, nineteen thousand, nine hundred nine".