129089099 has 4 divisors (see below), whose sum is σ = 129117480. Its totient is φ = 129060720.

The previous prime is 129089089. The next prime is 129089131. The reversal of 129089099 is 990980921.

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 129089099 - 2⁴ = 129089083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129089029) 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, 5657 + ... + 17034.

It is an arithmetic number, because the mean of its divisors is an integer number (32279370).

Almost surely, 2^129089099 is an apocalyptic number.

129089099 is a deficient number, since it is larger than the sum of its proper divisors (28381).

129089099 is an equidigital number, since it uses as much as digits as its factorization.

129089099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28380.

The product of its (nonzero) digits is 104976, while the sum is 47.

The square root of 129089099 is about 11361.7383793150. The cubic root of 129089099 is about 505.3937379592.

The spelling of 129089099 in words is "one hundred twenty-nine million, eighty-nine thousand, ninety-nine".