13881929 has 4 divisors (see below), whose sum is σ = 13934976. Its totient is φ = 13828884.

The previous prime is 13881871. The next prime is 13881943. The reversal of 13881929 is 92918831.

13881929 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, 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 13881929 - 2¹² = 13877833 is a prime.

It is a super-2 number, since 2×13881929² = 385415905522082, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13880929) 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, 26129 + ... + 26654.

It is an arithmetic number, because the mean of its divisors is an integer number (3483744).

Almost surely, 2^13881929 is an apocalyptic number.

It is an amenable number.

13881929 is a deficient number, since it is larger than the sum of its proper divisors (53047).

13881929 is an equidigital number, since it uses as much as digits as its factorization.

13881929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53046.

The product of its digits is 31104, while the sum is 41.

The square root of 13881929 is about 3725.8460784096. The cubic root of 13881929 is about 240.3347700888.

The spelling of 13881929 in words is "thirteen million, eight hundred eighty-one thousand, nine hundred twenty-nine".