129134999 has 8 divisors (see below), whose sum is σ = 152672160. Its totient is φ = 106870176.

The previous prime is 129134989. The next prime is 129135053. The reversal of 129134999 is 999431921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-129134999 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 (129134939) 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, 317864 + ... + 318269.

It is an arithmetic number, because the mean of its divisors is an integer number (19084020).

Almost surely, 2^129134999 is an apocalyptic number.

129134999 is a deficient number, since it is larger than the sum of its proper divisors (23537161).

129134999 is an equidigital number, since it uses as much as digits as its factorization.

129134999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636169.

The product of its digits is 157464, while the sum is 47.

The square root of 129134999 is about 11363.7581371657. The cubic root of 129134999 is about 505.4536315362.

The spelling of 129134999 in words is "one hundred twenty-nine million, one hundred thirty-four thousand, nine hundred ninety-nine".