135565537 has 2 divisors, whose sum is σ = 135565538. Its totient is φ = 135565536.

The previous prime is 135565523. The next prime is 135565543. The reversal of 135565537 is 735565531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84070561 + 51494976 = 9169^2 + 7176^2 .

It is an emirp because it is prime and its reverse (735565531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135565537 - 2¹¹ = 135563489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135565537.

It is not a weakly prime, because it can be changed into another prime (135565597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67782768 + 67782769.

It is an arithmetic number, because the mean of its divisors is an integer number (67782769).

Almost surely, 2^135565537 is an apocalyptic number.

It is an amenable number.

135565537 is a deficient number, since it is larger than the sum of its proper divisors (1).

135565537 is an equidigital number, since it uses as much as digits as its factorization.

135565537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 236250, while the sum is 40.

The square root of 135565537 is about 11643.2614417095. The cubic root of 135565537 is about 513.7081228310.

The spelling of 135565537 in words is "one hundred thirty-five million, five hundred sixty-five thousand, five hundred thirty-seven".