129579089 has 2 divisors, whose sum is σ = 129579090. Its totient is φ = 129579088.

The previous prime is 129579077. The next prime is 129579103. The reversal of 129579089 is 980975921.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129572689 + 6400 = 11383^2 + 80^2 .

It is a cyclic number.

It is not a de Polignac number, because 129579089 - 2¹² = 129574993 is a prime.

It is not a weakly prime, because it can be changed into another prime (129579029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64789544 + 64789545.

It is an arithmetic number, because the mean of its divisors is an integer number (64789545).

Almost surely, 2^129579089 is an apocalyptic number.

It is an amenable number.

129579089 is a deficient number, since it is larger than the sum of its proper divisors (1).

129579089 is an equidigital number, since it uses as much as digits as its factorization.

129579089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 50.

The square root of 129579089 is about 11383.2811174986. The cubic root of 129579089 is about 506.0323800929.

The spelling of 129579089 in words is "one hundred twenty-nine million, five hundred seventy-nine thousand, eighty-nine".