13945978879 has 4 divisors (see below), whose sum is σ = 15938261584. Its totient is φ = 11953696176.

The previous prime is 13945978873. The next prime is 13945978889. The reversal of 13945978879 is 97887954931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13945978879 - 2⁹ = 13945978367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13945978873) 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, 996141342 + ... + 996141355.

It is an arithmetic number, because the mean of its divisors is an integer number (3984565396).

Almost surely, 2^13945978879 is an apocalyptic number.

13945978879 is a deficient number, since it is larger than the sum of its proper divisors (1992282705).

13945978879 is an equidigital number, since it uses as much as digits as its factorization.

13945978879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992282704.

The product of its digits is 137168640, while the sum is 70.

The spelling of 13945978879 in words is "thirteen billion, nine hundred forty-five million, nine hundred seventy-eight thousand, eight hundred seventy-nine".