13912910209 has 9 divisors (see below), whose sum is σ = 15294129249. Its totient is φ = 12646920660.

The previous prime is 13912910191. The next prime is 13912910251. The reversal of 13912910209 is 90201921931.

It is a happy number.

The square root of 13912910209 is 117953.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 13912910209 - 2¹¹ = 13912908161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13912914209) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1292122 + ... + 1302844.

Almost surely, 2^13912910209 is an apocalyptic number.

13912910209 is the 117953-rd square number.

13912910209 is the 58977-th centered octagonal number.

It is an amenable number.

13912910209 is a deficient number, since it is larger than the sum of its proper divisors (1381219040).

13912910209 is an frugal number, since it uses more digits than its factorization.

13912910209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21468 (or 10734 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 37.

The spelling of 13912910209 in words is "thirteen billion, nine hundred twelve million, nine hundred ten thousand, two hundred nine".