13978662949 has 8 divisors (see below), whose sum is σ = 14211456480. Its totient is φ = 13745986800.

The previous prime is 13978662917. The next prime is 13978662953. The reversal of 13978662949 is 94926687931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13978662949 - 2⁵ = 13978662917 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 (13978662989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229662 + ... + 284080.

It is an arithmetic number, because the mean of its divisors is an integer number (1776432060).

Almost surely, 2^13978662949 is an apocalyptic number.

It is an amenable number.

13978662949 is a deficient number, since it is larger than the sum of its proper divisors (232793531).

13978662949 is an equidigital number, since it uses as much as digits as its factorization.

13978662949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58691.

The product of its digits is 35271936, while the sum is 64.

The spelling of 13978662949 in words is "thirteen billion, nine hundred seventy-eight million, six hundred sixty-two thousand, nine hundred forty-nine".