129436898 has 16 divisors (see below), whose sum is σ = 198389184. Its totient is φ = 63320400.

The previous prime is 129436891. The next prime is 129436913. The reversal of 129436898 is 898634921.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (129436891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17036 + ... + 23432.

It is an arithmetic number, because the mean of its divisors is an integer number (12399324).

Almost surely, 2^129436898 is an apocalyptic number.

129436898 is a deficient number, since it is larger than the sum of its proper divisors (68952286).

129436898 is a wasteful number, since it uses less digits than its factorization.

129436898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6617.

The product of its digits is 746496, while the sum is 50.

The square root of 129436898 is about 11377.0337962054. The cubic root of 129436898 is about 505.8472175393.

The spelling of 129436898 in words is "one hundred twenty-nine million, four hundred thirty-six thousand, eight hundred ninety-eight".