129133047 has 8 divisors (see below), whose sum is σ = 172447744. Its totient is φ = 85953528.

The previous prime is 129133033. The next prime is 129133051. The reversal of 129133047 is 740331921.

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

It is not a de Polignac number, because 129133047 - 2⁴ = 129133031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129133087) 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, 31543 + ... + 35400.

It is an arithmetic number, because the mean of its divisors is an integer number (21555968).

Almost surely, 2^129133047 is an apocalyptic number.

129133047 is a deficient number, since it is larger than the sum of its proper divisors (43314697).

129133047 is an equidigital number, since it uses as much as digits as its factorization.

129133047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67589.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 129133047 is about 11363.6722497615. The cubic root of 129133047 is about 505.4510847171.

Adding to 129133047 its reverse (740331921), we get a palindrome (869464968).

The spelling of 129133047 in words is "one hundred twenty-nine million, one hundred thirty-three thousand, forty-seven".