13900488209 has 4 divisors (see below), whose sum is σ = 14718164004. Its totient is φ = 13082812416.

The previous prime is 13900488197. The next prime is 13900488223. The reversal of 13900488209 is 90288400931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90288400931 = 191 ⋅472714141.

It can be written as a sum of positive squares in 2 ways, for example, as 12276640000 + 1623848209 = 110800^2 + 40297^2 .

It is a cyclic number.

It is not a de Polignac number, because 13900488209 - 2⁴ = 13900488193 is a prime.

It is a Duffinian number.

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 13900488209.

It is not an unprimeable number, because it can be changed into a prime (13900488269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408837872 + ... + 408837905.

It is an arithmetic number, because the mean of its divisors is an integer number (3679541001).

Almost surely, 2^13900488209 is an apocalyptic number.

It is an amenable number.

13900488209 is a deficient number, since it is larger than the sum of its proper divisors (817675795).

13900488209 is an equidigital number, since it uses as much as digits as its factorization.

13900488209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817675794.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 13900488209 in words is "thirteen billion, nine hundred million, four hundred eighty-eight thousand, two hundred nine".