129591950 has 12 divisors (see below), whose sum is σ = 241041120. Its totient is φ = 51836760.

The previous prime is 129591949. The next prime is 129591961. The reversal of 129591950 is 59195921.

129591950 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 129591898 and 129591907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1295870 + ... + 1295969.

It is an arithmetic number, because the mean of its divisors is an integer number (20086760).

Almost surely, 2^129591950 is an apocalyptic number.

129591950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129591950 is a deficient number, since it is larger than the sum of its proper divisors (111449170).

129591950 is a wasteful number, since it uses less digits than its factorization.

129591950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591851 (or 2591846 counting only the distinct ones).

The product of its (nonzero) digits is 36450, while the sum is 41.

The square root of 129591950 is about 11383.8460109051. The cubic root of 129591950 is about 506.0491211355.

The spelling of 129591950 in words is "one hundred twenty-nine million, five hundred ninety-one thousand, nine hundred fifty".