129887353 has 4 divisors (see below), whose sum is σ = 133397860. Its totient is φ = 126376848.

The previous prime is 129887347. The next prime is 129887383. The reversal of 129887353 is 353788921.

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 82937449 + 46949904 = 9107^2 + 6852^2 .

It is a cyclic number.

It is not a de Polignac number, because 129887353 - 2⁵ = 129887321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129887383) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1755198 + ... + 1755271.

It is an arithmetic number, because the mean of its divisors is an integer number (33349465).

Almost surely, 2^129887353 is an apocalyptic number.

It is an amenable number.

129887353 is a deficient number, since it is larger than the sum of its proper divisors (3510507).

129887353 is an equidigital number, since it uses as much as digits as its factorization.

129887353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3510506.

The product of its digits is 362880, while the sum is 46.

The square root of 129887353 is about 11396.8132826681. The cubic root of 129887353 is about 506.4333399252.

The spelling of 129887353 in words is "one hundred twenty-nine million, eight hundred eighty-seven thousand, three hundred fifty-three".