129498889 has 8 divisors (see below), whose sum is σ = 146800640. Its totient is φ = 113245776.

The previous prime is 129498883. The next prime is 129498917. The reversal of 129498889 is 988894921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129498889 - 2⁵ = 129498857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129498883) 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, 261897 + ... + 262390.

It is an arithmetic number, because the mean of its divisors is an integer number (18350080).

Almost surely, 2^129498889 is an apocalyptic number.

129498889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

129498889 is a deficient number, since it is larger than the sum of its proper divisors (17301751).

129498889 is a wasteful number, since it uses less digits than its factorization.

129498889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524319.

The product of its digits is 2985984, while the sum is 58.

The square root of 129498889 is about 11379.7578620988. The cubic root of 129498889 is about 505.9279595086.

The spelling of 129498889 in words is "one hundred twenty-nine million, four hundred ninety-eight thousand, eight hundred eighty-nine".