129765893 has 2 divisors, whose sum is σ = 129765894. Its totient is φ = 129765892.

The previous prime is 129765863. The next prime is 129765901. The reversal of 129765893 is 398567921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116683204 + 13082689 = 10802^2 + 3617^2 .

It is a cyclic number.

It is not a de Polignac number, because 129765893 - 2¹⁸ = 129503749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129765863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64882946 + 64882947.

It is an arithmetic number, because the mean of its divisors is an integer number (64882947).

Almost surely, 2^129765893 is an apocalyptic number.

It is an amenable number.

129765893 is a deficient number, since it is larger than the sum of its proper divisors (1).

129765893 is an equidigital number, since it uses as much as digits as its factorization.

129765893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 50.

The square root of 129765893 is about 11391.4833538043. The cubic root of 129765893 is about 506.2754323859.

The spelling of 129765893 in words is "one hundred twenty-nine million, seven hundred sixty-five thousand, eight hundred ninety-three".