129000207 has 32 divisors (see below), whose sum is σ = 209940480. Its totient is φ = 68866560.

The previous prime is 129000197. The next prime is 129000211. The reversal of 129000207 is 702000921.

It is a happy number.

It is not a de Polignac number, because 129000207 - 2⁶ = 129000143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129000257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15463 + ... + 22295.

It is an arithmetic number, because the mean of its divisors is an integer number (6560640).

Almost surely, 2^129000207 is an apocalyptic number.

129000207 is a deficient number, since it is larger than the sum of its proper divisors (80940273).

129000207 is a wasteful number, since it uses less digits than its factorization.

129000207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6903.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 129000207 is about 11357.8258042638. The cubic root of 129000207 is about 505.2777049854.

The spelling of 129000207 in words is "one hundred twenty-nine million, two hundred seven", and thus it is an aban number.