129140931 has 8 divisors (see below), whose sum is σ = 172573200. Its totient is φ = 85901312.

The previous prime is 129140917. The next prime is 129140941. The reversal of 129140931 is 139041921.

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

It is a cyclic number.

It is not a de Polignac number, because 129140931 - 2⁵ = 129140899 is a prime.

It is a super-2 number, since 2×129140931² = 33354760119093522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129140941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46590 + ... + 49283.

It is an arithmetic number, because the mean of its divisors is an integer number (21571650).

Almost surely, 2^129140931 is an apocalyptic number.

129140931 is a deficient number, since it is larger than the sum of its proper divisors (43432269).

129140931 is an equidigital number, since it uses as much as digits as its factorization.

129140931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96325.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 129140931 is about 11364.0191393714. The cubic root of 129140931 is about 505.4613709951.

The spelling of 129140931 in words is "one hundred twenty-nine million, one hundred forty thousand, nine hundred thirty-one".