13980309 has 16 divisors (see below), whose sum is σ = 21362688. Its totient is φ = 7966512.

The previous prime is 13980277. The next prime is 13980311. The reversal of 13980309 is 90308931.

13980309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13980309 - 2⁵ = 13980277 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13980309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13980359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9544 + ... + 10910.

It is an arithmetic number, because the mean of its divisors is an integer number (1335168).

Almost surely, 2^13980309 is an apocalyptic number.

It is an amenable number.

13980309 is a deficient number, since it is larger than the sum of its proper divisors (7382379).

13980309 is a wasteful number, since it uses less digits than its factorization.

13980309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 13980309 is about 3739.0251403274. The cubic root of 13980309 is about 240.9011778969.

The spelling of 13980309 in words is "thirteen million, nine hundred eighty thousand, three hundred nine".