129985298 has 8 divisors (see below), whose sum is σ = 206447292. Its totient is φ = 61169536.

The previous prime is 129985291. The next prime is 129985313. The reversal of 129985298 is 892589921.

It can be written as a sum of positive squares in 2 ways, for example, as 126720049 + 3265249 = 11257^2 + 1807^2 .

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

It is a super-2 number, since 2×129985298² = 33792355392297608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129985291) 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, 1911515 + ... + 1911582.

Almost surely, 2^129985298 is an apocalyptic number.

129985298 is a deficient number, since it is larger than the sum of its proper divisors (76461994).

129985298 is a wasteful number, since it uses less digits than its factorization.

129985298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3823116.

The product of its digits is 933120, while the sum is 53.

The square root of 129985298 is about 11401.1095074120. The cubic root of 129985298 is about 506.5606044343.

The spelling of 129985298 in words is "one hundred twenty-nine million, nine hundred eighty-five thousand, two hundred ninety-eight".