129620089 has 4 divisors (see below), whose sum is σ = 129803620. Its totient is φ = 129436560.

The previous prime is 129620081. The next prime is 129620129. The reversal of 129620089 is 980026921.

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

It can be written as a sum of positive squares in 2 ways, for example, as 32262400 + 97357689 = 5680^2 + 9867^2 .

It is a cyclic number.

It is not a de Polignac number, because 129620089 - 2³ = 129620081 is a prime.

It is a super-3 number, since 3×129620089³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129620081) 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, 90702 + ... + 92119.

It is an arithmetic number, because the mean of its divisors is an integer number (32450905).

Almost surely, 2^129620089 is an apocalyptic number.

It is an amenable number.

129620089 is a deficient number, since it is larger than the sum of its proper divisors (183531).

129620089 is an equidigital number, since it uses as much as digits as its factorization.

129620089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183530.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 129620089 is about 11385.0818618049. The cubic root of 129620089 is about 506.0857455444.

The spelling of 129620089 in words is "one hundred twenty-nine million, six hundred twenty thousand, eighty-nine".