13929169805 has 18 divisors (see below), whose sum is σ = 17093430126. Its totient is φ = 10896531888.

The previous prime is 13929169777. The next prime is 13929169823. The reversal of 13929169805 is 50896192931.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11143335844 + 2785833961 = 105562^2 + 52781^2 .

It is not a de Polignac number, because 13929169805 - 2⁶ = 13929169741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12402974 + ... + 12404096.

It is an arithmetic number, because the mean of its divisors is an integer number (949635007).

Almost surely, 2^13929169805 is an apocalyptic number.

It is an amenable number.

13929169805 is a deficient number, since it is larger than the sum of its proper divisors (3164260321).

13929169805 is an frugal number, since it uses more digits than its factorization.

13929169805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345 (or 1175 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 53.

The spelling of 13929169805 in words is "thirteen billion, nine hundred twenty-nine million, one hundred sixty-nine thousand, eight hundred five".