129635393 has 2 divisors, whose sum is σ = 129635394. Its totient is φ = 129635392.

The previous prime is 129635381. The next prime is 129635477. The reversal of 129635393 is 393536921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88585744 + 41049649 = 9412^2 + 6407^2 .

It is a cyclic number.

It is not a de Polignac number, because 129635393 - 2¹⁰ = 129634369 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 129635393.

It is not a weakly prime, because it can be changed into another prime (129635323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64817696 + 64817697.

It is an arithmetic number, because the mean of its divisors is an integer number (64817697).

Almost surely, 2^129635393 is an apocalyptic number.

It is an amenable number.

129635393 is a deficient number, since it is larger than the sum of its proper divisors (1).

129635393 is an equidigital number, since it uses as much as digits as its factorization.

129635393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131220, while the sum is 41.

The square root of 129635393 is about 11385.7539495635. The cubic root of 129635393 is about 506.1056622911.

The spelling of 129635393 in words is "one hundred twenty-nine million, six hundred thirty-five thousand, three hundred ninety-three".