135268889 has 4 divisors (see below), whose sum is σ = 154593024. Its totient is φ = 115944756.

The previous prime is 135268853. The next prime is 135268909. The reversal of 135268889 is 988862531.

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 135268889 - 2²⁴ = 118491673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135268829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9662057 + ... + 9662070.

It is an arithmetic number, because the mean of its divisors is an integer number (38648256).

Almost surely, 2^135268889 is an apocalyptic number.

It is an amenable number.

135268889 is a deficient number, since it is larger than the sum of its proper divisors (19324135).

135268889 is an equidigital number, since it uses as much as digits as its factorization.

135268889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19324134.

The product of its digits is 829440, while the sum is 50.

The square root of 135268889 is about 11630.5154228005. The cubic root of 135268889 is about 513.3331460710. Note that the first 3 decimals are identical.

The spelling of 135268889 in words is "one hundred thirty-five million, two hundred sixty-eight thousand, eight hundred eighty-nine".