129899267 has 4 divisors (see below), whose sum is σ = 133410096. Its totient is φ = 126388440.

The previous prime is 129899251. The next prime is 129899279. The reversal of 129899267 is 762998921.

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 129899267 - 2⁴ = 129899251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129899467) 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, 1755359 + ... + 1755432.

It is an arithmetic number, because the mean of its divisors is an integer number (33352524).

Almost surely, 2^129899267 is an apocalyptic number.

129899267 is a deficient number, since it is larger than the sum of its proper divisors (3510829).

129899267 is an equidigital number, since it uses as much as digits as its factorization.

129899267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3510828.

The product of its digits is 979776, while the sum is 53.

The square root of 129899267 is about 11397.3359606533. The cubic root of 129899267 is about 506.4488237585.

The spelling of 129899267 in words is "one hundred twenty-nine million, eight hundred ninety-nine thousand, two hundred sixty-seven".