64636129 has 2 divisors, whose sum is σ = 64636130. Its totient is φ = 64636128.

The previous prime is 64636123. The next prime is 64636133. The reversal of 64636129 is 92163646.

It is a happy number.

64636129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61591104 + 3045025 = 7848^2 + 1745^2 .

It is a cyclic number.

It is not a de Polignac number, because 64636129 - 2⁹ = 64635617 is a prime.

It is not a weakly prime, because it can be changed into another prime (64636123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32318064 + 32318065.

It is an arithmetic number, because the mean of its divisors is an integer number (32318065).

Almost surely, 2^64636129 is an apocalyptic number.

It is an amenable number.

64636129 is a deficient number, since it is larger than the sum of its proper divisors (1).

64636129 is an equidigital number, since it uses as much as digits as its factorization.

64636129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 37.

The square root of 64636129 is about 8039.6597564822. The cubic root of 64636129 is about 401.3209019934.

The spelling of 64636129 in words is "sixty-four million, six hundred thirty-six thousand, one hundred twenty-nine".