129084274089 has 81 divisors (see below), whose sum is σ = 201369720279. Its totient is φ = 79674598080.

The previous prime is 129084274079. The next prime is 129084274103. The reversal of 129084274089 is 980472480921.

The square root of 129084274089 is 359283.

It is a perfect power (a square), and thus also a powerful number.

129084274089 is a `hidden beast` number, since 1 + 290 + 8 + 4 + 274 + 0 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6220003689 + 122864270400 = 78867^2 + 350520^2 .

It is not a de Polignac number, because 129084274089 - 2¹³ = 129084265897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129084274049) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1016411544 + ... + 1016411670.

Almost surely, 2^129084274089 is an apocalyptic number.

129084274089 is the 359283-rd square number.

129084274089 is the 179642-nd centered octagonal number.

It is an amenable number.

129084274089 is a deficient number, since it is larger than the sum of its proper divisors (72285446190).

129084274089 is an equidigital number, since it uses as much as digits as its factorization.

129084274089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 129084274089 in words is "one hundred twenty-nine billion, eighty-four million, two hundred seventy-four thousand, eighty-nine".