129814885 has 4 divisors (see below), whose sum is σ = 155777868. Its totient is φ = 103851904.

The previous prime is 129814879. The next prime is 129814901. The reversal of 129814885 is 588418921.

It is a happy number.

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 42224004 + 87590881 = 6498^2 + 9359^2 .

It is a cyclic number.

It is not a de Polignac number, because 129814885 - 2³ = 129814877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12981484 + ... + 12981493.

It is an arithmetic number, because the mean of its divisors is an integer number (38944467).

Almost surely, 2^129814885 is an apocalyptic number.

It is an amenable number.

129814885 is a deficient number, since it is larger than the sum of its proper divisors (25962983).

129814885 is an equidigital number, since it uses as much as digits as its factorization.

129814885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25962982.

The product of its digits is 184320, while the sum is 46.

The square root of 129814885 is about 11393.6335293005. The cubic root of 129814885 is about 506.3391376853.

The spelling of 129814885 in words is "one hundred twenty-nine million, eight hundred fourteen thousand, eight hundred eighty-five".