135959531 has 2 divisors, whose sum is σ = 135959532. Its totient is φ = 135959530.

The previous prime is 135959501. The next prime is 135959539.

135959531 is nontrivially palindromic in base 10.

135959531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135959531 is a prime.

It is a super-3 number, since 3×135959531³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135959539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67979765 + 67979766.

It is an arithmetic number, because the mean of its divisors is an integer number (67979766).

Almost surely, 2^135959531 is an apocalyptic number.

135959531 is a deficient number, since it is larger than the sum of its proper divisors (1).

135959531 is an equidigital number, since it uses as much as digits as its factorization.

135959531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91125, while the sum is 41.

The square root of 135959531 is about 11660.1685665345. The cubic root of 135959531 is about 514.2053046426.

The spelling of 135959531 in words is "one hundred thirty-five million, nine hundred fifty-nine thousand, five hundred thirty-one".