129265853 has 2 divisors, whose sum is σ = 129265854. Its totient is φ = 129265852.

The previous prime is 129265733. The next prime is 129265861. The reversal of 129265853 is 358562921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112635769 + 16630084 = 10613^2 + 4078^2 .

It is a cyclic number.

It is not a de Polignac number, because 129265853 - 2⁸ = 129265597 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129265853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129265453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64632926 + 64632927.

It is an arithmetic number, because the mean of its divisors is an integer number (64632927).

Almost surely, 2^129265853 is an apocalyptic number.

It is an amenable number.

129265853 is a deficient number, since it is larger than the sum of its proper divisors (1).

129265853 is an equidigital number, since it uses as much as digits as its factorization.

129265853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 41.

The square root of 129265853 is about 11369.5141936672. The cubic root of 129265853 is about 505.6243012545.

The spelling of 129265853 in words is "one hundred twenty-nine million, two hundred sixty-five thousand, eight hundred fifty-three".