129572827 has 8 divisors (see below), whose sum is σ = 138478896. Its totient is φ = 120809472.

The previous prime is 129572797. The next prime is 129572873. The reversal of 129572827 is 728275921.

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 129572827 - 2⁷ = 129572699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129572887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33798 + ... + 37435.

It is an arithmetic number, because the mean of its divisors is an integer number (17309862).

Almost surely, 2^129572827 is an apocalyptic number.

129572827 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

129572827 is a deficient number, since it is larger than the sum of its proper divisors (8906069).

129572827 is a wasteful number, since it uses less digits than its factorization.

129572827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71357.

The product of its digits is 141120, while the sum is 43.

The square root of 129572827 is about 11383.0060616693. The cubic root of 129572827 is about 506.0242285055.

The spelling of 129572827 in words is "one hundred twenty-nine million, five hundred seventy-two thousand, eight hundred twenty-seven".