13929929 has 4 divisors (see below), whose sum is σ = 15001476. Its totient is φ = 12858384.

The previous prime is 13929913. The next prime is 13929961. The reversal of 13929929 is 92992931.

13929929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4020025 + 9909904 = 2005^2 + 3148^2 .

It is a cyclic number.

It is not a de Polignac number, because 13929929 - 2⁴ = 13929913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13929929.

It is not an unprimeable number, because it can be changed into a prime (13929989) 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, 535754 + ... + 535779.

It is an arithmetic number, because the mean of its divisors is an integer number (3750369).

Almost surely, 2^13929929 is an apocalyptic number.

It is an amenable number.

13929929 is a deficient number, since it is larger than the sum of its proper divisors (1071547).

13929929 is a wasteful number, since it uses less digits than its factorization.

13929929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071546.

The product of its digits is 78732, while the sum is 44.

The square root of 13929929 is about 3732.2820097093. The cubic root of 13929929 is about 240.6114558970.

The spelling of 13929929 in words is "thirteen million, nine hundred twenty-nine thousand, nine hundred twenty-nine".