13928849709 has 4 divisors (see below), whose sum is σ = 18571799616. Its totient is φ = 9285899804.

The previous prime is 13928849663. The next prime is 13928849719. The reversal of 13928849709 is 90794882931.

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 13928849709 - 2¹¹ = 13928847661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13928849719) 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, 2321474949 + ... + 2321474954.

It is an arithmetic number, because the mean of its divisors is an integer number (4642949904).

Almost surely, 2^13928849709 is an apocalyptic number.

It is an amenable number.

13928849709 is a deficient number, since it is larger than the sum of its proper divisors (4642949907).

13928849709 is an equidigital number, since it uses as much as digits as its factorization.

13928849709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4642949906.

The product of its (nonzero) digits is 7838208, while the sum is 60.

The spelling of 13928849709 in words is "thirteen billion, nine hundred twenty-eight million, eight hundred forty-nine thousand, seven hundred nine".