129885698 has 4 divisors (see below), whose sum is σ = 194828550. Its totient is φ = 64942848.

The previous prime is 129885673. The next prime is 129885713. The reversal of 129885698 is 896588921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 98267569 + 31618129 = 9913^2 + 5623^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32471423 + ... + 32471426.

Almost surely, 2^129885698 is an apocalyptic number.

129885698 is a deficient number, since it is larger than the sum of its proper divisors (64942852).

129885698 is an equidigital number, since it uses as much as digits as its factorization.

129885698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64942851.

The product of its digits is 2488320, while the sum is 56.

The square root of 129885698 is about 11396.7406744209. The cubic root of 129885698 is about 506.4311889569.

The spelling of 129885698 in words is "one hundred twenty-nine million, eight hundred eighty-five thousand, six hundred ninety-eight".