13091309 has 32 divisors (see below), whose sum is σ = 17646336. Its totient is φ = 9400320.

The previous prime is 13091291. The next prime is 13091311. The reversal of 13091309 is 90319031.

It is not a de Polignac number, because 13091309 - 2¹² = 13087213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13091329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95489 + ... + 95625.

It is an arithmetic number, because the mean of its divisors is an integer number (551448).

Almost surely, 2^13091309 is an apocalyptic number.

It is an amenable number.

13091309 is a deficient number, since it is larger than the sum of its proper divisors (4555027).

13091309 is a wasteful number, since it uses less digits than its factorization.

13091309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245.

The product of its (nonzero) digits is 729, while the sum is 26.

The square root of 13091309 is about 3618.1913990280. The cubic root of 13091309 is about 235.6826926392.

The spelling of 13091309 in words is "thirteen million, ninety-one thousand, three hundred nine".