13913873209 has 2 divisors, whose sum is σ = 13913873210. Its totient is φ = 13913873208.

The previous prime is 13913873179. The next prime is 13913873231. The reversal of 13913873209 is 90237831931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10357539984 + 3556333225 = 101772^2 + 59635^2 .

It is a cyclic number.

It is not a de Polignac number, because 13913873209 - 2³³ = 5323938617 is a prime.

It is a super-2 number, since 2×13913873209² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13913873609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6956936604 + 6956936605.

It is an arithmetic number, because the mean of its divisors is an integer number (6956936605).

Almost surely, 2^13913873209 is an apocalyptic number.

It is an amenable number.

13913873209 is a deficient number, since it is larger than the sum of its proper divisors (1).

13913873209 is an equidigital number, since it uses as much as digits as its factorization.

13913873209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 46.

The spelling of 13913873209 in words is "thirteen billion, nine hundred thirteen million, eight hundred seventy-three thousand, two hundred nine".