135815089 has 4 divisors (see below), whose sum is σ = 135838720. Its totient is φ = 135791460.

The previous prime is 135815077. The next prime is 135815111. The reversal of 135815089 is 980518531.

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 135815089 - 2⁷ = 135814961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135815189) 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, 2992 + ... + 16750.

It is an arithmetic number, because the mean of its divisors is an integer number (33959680).

Almost surely, 2^135815089 is an apocalyptic number.

It is an amenable number.

135815089 is a deficient number, since it is larger than the sum of its proper divisors (23631).

135815089 is an equidigital number, since it uses as much as digits as its factorization.

135815089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23630.

The product of its (nonzero) digits is 43200, while the sum is 40.

The square root of 135815089 is about 11653.9730993340. The cubic root of 135815089 is about 514.0231446527.

The spelling of 135815089 in words is "one hundred thirty-five million, eight hundred fifteen thousand, eighty-nine".