129036971 has 8 divisors (see below), whose sum is σ = 148849920. Its totient is φ = 109568808.

The previous prime is 129036967. The next prime is 129036991. The reversal of 129036971 is 179630921.

It is a happy number.

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 129036971 - 2² = 129036967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129036931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85391 + ... + 86888.

It is an arithmetic number, because the mean of its divisors is an integer number (18606240).

Almost surely, 2^129036971 is an apocalyptic number.

129036971 is a deficient number, since it is larger than the sum of its proper divisors (19812949).

129036971 is a wasteful number, since it uses less digits than its factorization.

129036971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172393.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 129036971 is about 11359.4441325269. Note that the first 3 decimals coincide. The cubic root of 129036971 is about 505.3257004256.

The spelling of 129036971 in words is "one hundred twenty-nine million, thirty-six thousand, nine hundred seventy-one".