135856529 has 2 divisors, whose sum is σ = 135856530. Its totient is φ = 135856528.

The previous prime is 135856507. The next prime is 135856541. The reversal of 135856529 is 925658531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135675904 + 180625 = 11648^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 135856529 - 2¹² = 135852433 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 135856529.

It is not a weakly prime, because it can be changed into another prime (135856559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67928264 + 67928265.

It is an arithmetic number, because the mean of its divisors is an integer number (67928265).

Almost surely, 2^135856529 is an apocalyptic number.

It is an amenable number.

135856529 is a deficient number, since it is larger than the sum of its proper divisors (1).

135856529 is an equidigital number, since it uses as much as digits as its factorization.

135856529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324000, while the sum is 44.

The square root of 135856529 is about 11655.7508981618. The cubic root of 135856529 is about 514.0754190432.

The spelling of 135856529 in words is "one hundred thirty-five million, eight hundred fifty-six thousand, five hundred twenty-nine".