13981197209 has 16 divisors (see below), whose sum is σ = 16146124800. Its totient is φ = 11858664384.

The previous prime is 13981197157. The next prime is 13981197229. The reversal of 13981197209 is 90279118931.

It is not a de Polignac number, because 13981197209 - 2⁸ = 13981196953 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13981197229) 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, 325607 + ... + 366035.

It is an arithmetic number, because the mean of its divisors is an integer number (1009132800).

Almost surely, 2^13981197209 is an apocalyptic number.

It is an amenable number.

13981197209 is a deficient number, since it is larger than the sum of its proper divisors (2164927591).

13981197209 is a wasteful number, since it uses less digits than its factorization.

13981197209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40952.

The product of its (nonzero) digits is 244944, while the sum is 50.

The spelling of 13981197209 in words is "thirteen billion, nine hundred eighty-one million, one hundred ninety-seven thousand, two hundred nine".