135613993 has 2 divisors, whose sum is σ = 135613994. Its totient is φ = 135613992.

The previous prime is 135613987. The next prime is 135614021. The reversal of 135613993 is 399316531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67848169 + 67765824 = 8237^2 + 8232^2 .

It is an emirp because it is prime and its reverse (399316531) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135613993 is a prime.

It is not a weakly prime, because it can be changed into another prime (135613493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67806996 + 67806997.

It is an arithmetic number, because the mean of its divisors is an integer number (67806997).

Almost surely, 2^135613993 is an apocalyptic number.

It is an amenable number.

135613993 is a deficient number, since it is larger than the sum of its proper divisors (1).

135613993 is an equidigital number, since it uses as much as digits as its factorization.

135613993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65610, while the sum is 40.

The square root of 135613993 is about 11645.3421160565. The cubic root of 135613993 is about 513.7693214614.

The spelling of 135613993 in words is "one hundred thirty-five million, six hundred thirteen thousand, nine hundred ninety-three".