129886013 has 4 divisors (see below), whose sum is σ = 129909660. Its totient is φ = 129862368.

The previous prime is 129885989. The next prime is 129886027. The reversal of 129886013 is 310688921.

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 10355524 + 119530489 = 3218^2 + 10933^2 .

It is a cyclic number.

It is not a de Polignac number, because 129886013 - 2⁶ = 129885949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129886213) 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, 1193 + ... + 16161.

It is an arithmetic number, because the mean of its divisors is an integer number (32477415).

Almost surely, 2^129886013 is an apocalyptic number.

It is an amenable number.

129886013 is a deficient number, since it is larger than the sum of its proper divisors (23647).

129886013 is an equidigital number, since it uses as much as digits as its factorization.

129886013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23646.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 129886013 is about 11396.7544941531. The cubic root of 129886013 is about 506.4315983571.

The spelling of 129886013 in words is "one hundred twenty-nine million, eight hundred eighty-six thousand, thirteen".