129707077 has 2 divisors, whose sum is σ = 129707078. Its totient is φ = 129707076.

The previous prime is 129707047. The next prime is 129707099. The reversal of 129707077 is 770707921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92179201 + 37527876 = 9601^2 + 6126^2 .

It is a cyclic number.

It is not a de Polignac number, because 129707077 - 2⁷ = 129706949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129707027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64853538 + 64853539.

It is an arithmetic number, because the mean of its divisors is an integer number (64853539).

Almost surely, 2^129707077 is an apocalyptic number.

It is an amenable number.

129707077 is a deficient number, since it is larger than the sum of its proper divisors (1).

129707077 is an equidigital number, since it uses as much as digits as its factorization.

129707077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43218, while the sum is 40.

The square root of 129707077 is about 11388.9014834619. The cubic root of 129707077 is about 506.1989315554.

The spelling of 129707077 in words is "one hundred twenty-nine million, seven hundred seven thousand, seventy-seven".