135984281 has 4 divisors (see below), whose sum is σ = 136147200. Its totient is φ = 135821364.

The previous prime is 135984253. The next prime is 135984293. The reversal of 135984281 is 182489531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 135984281 - 2¹⁸ = 135722137 is a prime.

It is a super-2 number, since 2×135984281² = 36983449358173922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135984781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80201 + ... + 81878.

It is an arithmetic number, because the mean of its divisors is an integer number (34036800).

Almost surely, 2^135984281 is an apocalyptic number.

It is an amenable number.

135984281 is a deficient number, since it is larger than the sum of its proper divisors (162919).

135984281 is an equidigital number, since it uses as much as digits as its factorization.

135984281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162918.

The product of its digits is 69120, while the sum is 41.

The square root of 135984281 is about 11661.2298236507. The cubic root of 135984281 is about 514.2365046353.

The spelling of 135984281 in words is "one hundred thirty-five million, nine hundred eighty-four thousand, two hundred eighty-one".