135491959 has 2 divisors, whose sum is σ = 135491960. Its totient is φ = 135491958.

The previous prime is 135491947. The next prime is 135491977. The reversal of 135491959 is 959194531.

It is a happy number.

135491959 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135491959 - 2¹⁹ = 134967671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135491999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67745979 + 67745980.

It is an arithmetic number, because the mean of its divisors is an integer number (67745980).

Almost surely, 2^135491959 is an apocalyptic number.

135491959 is a deficient number, since it is larger than the sum of its proper divisors (1).

135491959 is an equidigital number, since it uses as much as digits as its factorization.

135491959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 218700, while the sum is 46.

The square root of 135491959 is about 11640.1013311741. The cubic root of 135491959 is about 513.6151678973.

The spelling of 135491959 in words is "one hundred thirty-five million, four hundred ninety-one thousand, nine hundred fifty-nine".