135819259 has 2 divisors, whose sum is σ = 135819260. Its totient is φ = 135819258.

The previous prime is 135819253. The next prime is 135819289. The reversal of 135819259 is 952918531.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135819259 - 2⁵ = 135819227 is a prime.

It is a super-2 number, since 2×135819259² = 36893742230618162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135819253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67909629 + 67909630.

It is an arithmetic number, because the mean of its divisors is an integer number (67909630).

Almost surely, 2^135819259 is an apocalyptic number.

135819259 is a deficient number, since it is larger than the sum of its proper divisors (1).

135819259 is an equidigital number, since it uses as much as digits as its factorization.

135819259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 43.

The square root of 135819259 is about 11654.1520069029. The cubic root of 135819259 is about 514.0284053705.

The spelling of 135819259 in words is "one hundred thirty-five million, eight hundred nineteen thousand, two hundred fifty-nine".