135536993 has 2 divisors, whose sum is σ = 135536994. Its totient is φ = 135536992.

The previous prime is 135536987. The next prime is 135537011. The reversal of 135536993 is 399635531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127080529 + 8456464 = 11273^2 + 2908^2 .

It is a cyclic number.

It is not a de Polignac number, because 135536993 - 2¹⁰ = 135535969 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (135536893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67768496 + 67768497.

It is an arithmetic number, because the mean of its divisors is an integer number (67768497).

Almost surely, 2^135536993 is an apocalyptic number.

It is an amenable number.

135536993 is a deficient number, since it is larger than the sum of its proper divisors (1).

135536993 is an equidigital number, since it uses as much as digits as its factorization.

135536993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 328050, while the sum is 44.

The square root of 135536993 is about 11642.0356037937. The cubic root of 135536993 is about 513.6720656977.

The spelling of 135536993 in words is "one hundred thirty-five million, five hundred thirty-six thousand, nine hundred ninety-three".