135305881 has 2 divisors, whose sum is σ = 135305882. Its totient is φ = 135305880.

The previous prime is 135305867. The next prime is 135305957. The reversal of 135305881 is 188503531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125440000 + 9865881 = 11200^2 + 3141^2 .

It is a cyclic number.

It is not a de Polignac number, because 135305881 - 2⁹ = 135305369 is a prime.

It is a super-3 number, since 3×135305881³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (135305581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67652940 + 67652941.

It is an arithmetic number, because the mean of its divisors is an integer number (67652941).

Almost surely, 2^135305881 is an apocalyptic number.

It is an amenable number.

135305881 is a deficient number, since it is larger than the sum of its proper divisors (1).

135305881 is an equidigital number, since it uses as much as digits as its factorization.

135305881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 135305881 is about 11632.1056133445. The cubic root of 135305881 is about 513.3799355660.

The spelling of 135305881 in words is "one hundred thirty-five million, three hundred five thousand, eight hundred eighty-one".