129761950 has 24 divisors (see below), whose sum is σ = 249682680. Its totient is φ = 50114400.

The previous prime is 129761941. The next prime is 129761981. The reversal of 129761950 is 59167921.

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, 43296 + ... + 46195.

It is an arithmetic number, because the mean of its divisors is an integer number (10403445).

Almost surely, 2^129761950 is an apocalyptic number.

129761950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129761950 is a deficient number, since it is larger than the sum of its proper divisors (119920730).

129761950 is a wasteful number, since it uses less digits than its factorization.

129761950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89532 (or 89527 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 40.

The square root of 129761950 is about 11391.3102845985. The cubic root of 129761950 is about 506.2703045253.

The spelling of 129761950 in words is "one hundred twenty-nine million, seven hundred sixty-one thousand, nine hundred fifty".