68635129 has 2 divisors, whose sum is σ = 68635130. Its totient is φ = 68635128.

The previous prime is 68635123. The next prime is 68635153. The reversal of 68635129 is 92153686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68558400 + 76729 = 8280^2 + 277^2 .

It is a cyclic number.

It is not a de Polignac number, because 68635129 - 2⁵ = 68635097 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 68635091 and 68635100.

It is not a weakly prime, because it can be changed into another prime (68635123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34317564 + 34317565.

It is an arithmetic number, because the mean of its divisors is an integer number (34317565).

Almost surely, 2^68635129 is an apocalyptic number.

It is an amenable number.

68635129 is a deficient number, since it is larger than the sum of its proper divisors (1).

68635129 is an equidigital number, since it uses as much as digits as its factorization.

68635129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 40.

The square root of 68635129 is about 8284.6320980476. The cubic root of 68635129 is about 409.4323474931.

The spelling of 68635129 in words is "sixty-eight million, six hundred thirty-five thousand, one hundred twenty-nine".