13650687979 has 4 divisors (see below), whose sum is σ = 14244196176. Its totient is φ = 13057179784.

The previous prime is 13650687917. The next prime is 13650687983. The reversal of 13650687979 is 97978605631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97978605631 = 71 ⋅1379980361.

It is a cyclic number.

It is not a de Polignac number, because 13650687979 - 2²⁷ = 13516470251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13650684979) 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, 296754064 + ... + 296754109.

It is an arithmetic number, because the mean of its divisors is an integer number (3561049044).

Almost surely, 2^13650687979 is an apocalyptic number.

13650687979 is a deficient number, since it is larger than the sum of its proper divisors (593508197).

13650687979 is an equidigital number, since it uses as much as digits as its factorization.

13650687979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593508196.

The product of its (nonzero) digits is 17146080, while the sum is 61.

The spelling of 13650687979 in words is "thirteen billion, six hundred fifty million, six hundred eighty-seven thousand, nine hundred seventy-nine".