129137915 has 8 divisors (see below), whose sum is σ = 157506288. Its totient is φ = 101616480.

The previous prime is 129137887. The next prime is 129137917. The reversal of 129137915 is 519731921.

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

It is not a de Polignac number, because 129137915 - 2¹⁶ = 129072379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129137917) 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 7 ways as a sum of consecutive naturals, for example, 211397 + ... + 212006.

It is an arithmetic number, because the mean of its divisors is an integer number (19688286).

Almost surely, 2^129137915 is an apocalyptic number.

129137915 is a deficient number, since it is larger than the sum of its proper divisors (28368373).

129137915 is an equidigital number, since it uses as much as digits as its factorization.

129137915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423469.

The product of its digits is 17010, while the sum is 38.

The square root of 129137915 is about 11363.8864390665. The cubic root of 129137915 is about 505.4574360604.

The spelling of 129137915 in words is "one hundred twenty-nine million, one hundred thirty-seven thousand, nine hundred fifteen".