13881429 has 8 divisors (see below), whose sum is σ = 20565120. Its totient is φ = 9254268.

The previous prime is 13881421. The next prime is 13881437. The reversal of 13881429 is 92418831.

13881429 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13881421) and next prime (13881437).

It is not a de Polignac number, because 13881429 - 2³ = 13881421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13881393 and 13881402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13881421) 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, 257037 + ... + 257090.

It is an arithmetic number, because the mean of its divisors is an integer number (2570640).

Almost surely, 2^13881429 is an apocalyptic number.

It is an amenable number.

13881429 is a deficient number, since it is larger than the sum of its proper divisors (6683691).

13881429 is an equidigital number, since it uses as much as digits as its factorization.

13881429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514136 (or 514130 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 13881429 is about 3725.7789789519. The cubic root of 13881429 is about 240.3318845910.

The spelling of 13881429 in words is "thirteen million, eight hundred eighty-one thousand, four hundred twenty-nine".