13987734779 has 8 divisors (see below), whose sum is σ = 14247249408. Its totient is φ = 13729956520.

The previous prime is 13987734767. The next prime is 13987734799. The reversal of 13987734779 is 97743778931.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13987734779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13987734799) 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, 417827 + ... + 450060.

It is an arithmetic number, because the mean of its divisors is an integer number (1780906176).

Almost surely, 2^13987734779 is an apocalyptic number.

13987734779 is a deficient number, since it is larger than the sum of its proper divisors (259514629).

13987734779 is an equidigital number, since it uses as much as digits as its factorization.

13987734779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868185.

The product of its digits is 56010528, while the sum is 65.

The spelling of 13987734779 in words is "thirteen billion, nine hundred eighty-seven million, seven hundred thirty-four thousand, seven hundred seventy-nine".