129026077 has 2 divisors, whose sum is σ = 129026078. Its totient is φ = 129026076.

The previous prime is 129026071. The next prime is 129026083. The reversal of 129026077 is 770620921.

It is a balanced prime because it is at equal distance from previous prime (129026071) and next prime (129026083).

It can be written as a sum of positive squares in only one way, i.e., 87216921 + 41809156 = 9339^2 + 6466^2 .

It is a cyclic number.

It is not a de Polignac number, because 129026077 - 2³ = 129026069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129026071) 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, 64513038 + 64513039.

It is an arithmetic number, because the mean of its divisors is an integer number (64513039).

Almost surely, 2^129026077 is an apocalyptic number.

It is an amenable number.

129026077 is a deficient number, since it is larger than the sum of its proper divisors (1).

129026077 is an equidigital number, since it uses as much as digits as its factorization.

129026077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 129026077 is about 11358.9646095056. The cubic root of 129026077 is about 505.3114792478.

Adding to 129026077 its reverse (770620921), we get a palindrome (899646998).

The spelling of 129026077 in words is "one hundred twenty-nine million, twenty-six thousand, seventy-seven".