129508950 has 24 divisors (see below), whose sum is σ = 321182568. Its totient is φ = 34535680.

The previous prime is 129508937. The next prime is 129508987. The reversal of 129508950 is 59805921.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 129508899 and 129508908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 431547 + ... + 431846.

It is an arithmetic number, because the mean of its divisors is an integer number (13382607).

Almost surely, 2^129508950 is an apocalyptic number.

129508950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129508950 is an abundant number, since it is smaller than the sum of its proper divisors (191673618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129508950 is a wasteful number, since it uses less digits than its factorization.

129508950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863408 (or 863403 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 129508950 is about 11380.1999103706. The cubic root of 129508950 is about 505.9410613182.

The spelling of 129508950 in words is "one hundred twenty-nine million, five hundred eight thousand, nine hundred fifty".