129284207 has 4 divisors (see below), whose sum is σ = 139229160. Its totient is φ = 119339256.

The previous prime is 129284153. The next prime is 129284231. The reversal of 129284207 is 702482921.

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 129284207 - 2⁶ = 129284143 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 (129284257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4972457 + ... + 4972482.

It is an arithmetic number, because the mean of its divisors is an integer number (34807290).

Almost surely, 2^129284207 is an apocalyptic number.

129284207 is a deficient number, since it is larger than the sum of its proper divisors (9944953).

129284207 is an equidigital number, since it uses as much as digits as its factorization.

129284207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9944952.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 129284207 is about 11370.3213235159. The cubic root of 129284207 is about 505.6482307224.

The spelling of 129284207 in words is "one hundred twenty-nine million, two hundred eighty-four thousand, two hundred seven".