135515689 has 2 divisors, whose sum is σ = 135515690. Its totient is φ = 135515688.

The previous prime is 135515669. The next prime is 135515707. The reversal of 135515689 is 986515531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88360000 + 47155689 = 9400^2 + 6867^2 .

It is a cyclic number.

It is not a de Polignac number, because 135515689 - 2⁷ = 135515561 is a prime.

It is not a weakly prime, because it can be changed into another prime (135515659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67757844 + 67757845.

It is an arithmetic number, because the mean of its divisors is an integer number (67757845).

Almost surely, 2^135515689 is an apocalyptic number.

It is an amenable number.

135515689 is a deficient number, since it is larger than the sum of its proper divisors (1).

135515689 is an equidigital number, since it uses as much as digits as its factorization.

135515689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162000, while the sum is 43.

The square root of 135515689 is about 11641.1206075704. The cubic root of 135515689 is about 513.6451509225.

The spelling of 135515689 in words is "one hundred thirty-five million, five hundred fifteen thousand, six hundred eighty-nine".