129550987 has 6 divisors (see below), whose sum is σ = 136728708. Its totient is φ = 122732172.

The previous prime is 129550963. The next prime is 129550991. The reversal of 129550987 is 789055921.

It is not a de Polignac number, because 129550987 - 2¹⁵ = 129518219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129551987) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 179073 + ... + 179794.

It is an arithmetic number, because the mean of its divisors is an integer number (22788118).

Almost surely, 2^129550987 is an apocalyptic number.

129550987 is a deficient number, since it is larger than the sum of its proper divisors (7177721).

129550987 is an equidigital number, since it uses as much as digits as its factorization.

129550987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358905 (or 358886 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 46.

The square root of 129550987 is about 11382.0466964426. The cubic root of 129550987 is about 505.9957961292.

The spelling of 129550987 in words is "one hundred twenty-nine million, five hundred fifty thousand, nine hundred eighty-seven".