129059897 has 2 divisors, whose sum is σ = 129059898. Its totient is φ = 129059896.

The previous prime is 129059881. The next prime is 129059911. The reversal of 129059897 is 798950921.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101223721 + 27836176 = 10061^2 + 5276^2 .

It is a cyclic number.

It is not a de Polignac number, because 129059897 - 2⁴ = 129059881 is a prime.

It is not a weakly prime, because it can be changed into another prime (129059807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64529948 + 64529949.

It is an arithmetic number, because the mean of its divisors is an integer number (64529949).

Almost surely, 2^129059897 is an apocalyptic number.

It is an amenable number.

129059897 is a deficient number, since it is larger than the sum of its proper divisors (1).

129059897 is an equidigital number, since it uses as much as digits as its factorization.

129059897 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 129059897 is about 11360.4532039879. The cubic root of 129059897 is about 505.3556257275.

The spelling of 129059897 in words is "one hundred twenty-nine million, fifty-nine thousand, eight hundred ninety-seven".