129047651 has 4 divisors (see below), whose sum is σ = 133497600. Its totient is φ = 124597704.

The previous prime is 129047617. The next prime is 129047657. The reversal of 129047651 is 156740921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129047651 - 2²² = 124853347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129047657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2224931 + ... + 2224988.

It is an arithmetic number, because the mean of its divisors is an integer number (33374400).

Almost surely, 2^129047651 is an apocalyptic number.

129047651 is a deficient number, since it is larger than the sum of its proper divisors (4449949).

129047651 is an equidigital number, since it uses as much as digits as its factorization.

129047651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4449948.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 129047651 is about 11359.9142162254. The cubic root of 129047651 is about 505.3396414678.

The spelling of 129047651 in words is "one hundred twenty-nine million, forty-seven thousand, six hundred fifty-one".