13868232509 has 4 divisors (see below), whose sum is σ = 14315594880. Its totient is φ = 13420870140.

The previous prime is 13868232479. The next prime is 13868232517. The reversal of 13868232509 is 90523286831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13868232509 - 2⁸ = 13868232253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13868232529) 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, 223681139 + ... + 223681200.

It is an arithmetic number, because the mean of its divisors is an integer number (3578898720).

Almost surely, 2^13868232509 is an apocalyptic number.

It is an amenable number.

13868232509 is a deficient number, since it is larger than the sum of its proper divisors (447362371).

13868232509 is an equidigital number, since it uses as much as digits as its factorization.

13868232509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447362370.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 13868232509 in words is "thirteen billion, eight hundred sixty-eight million, two hundred thirty-two thousand, five hundred nine".