135565889 has 8 divisors (see below), whose sum is σ = 136754688. Its totient is φ = 134381520.

The previous prime is 135565877. The next prime is 135565951. The reversal of 135565889 is 988565531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135565889 is a prime.

It is a super-2 number, since 2×135565889² = 36756220520720642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135565849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91424 + ... + 92894.

It is an arithmetic number, because the mean of its divisors is an integer number (17094336).

Almost surely, 2^135565889 is an apocalyptic number.

It is an amenable number.

135565889 is a deficient number, since it is larger than the sum of its proper divisors (1188799).

135565889 is a wasteful number, since it uses less digits than its factorization.

135565889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2215.

The product of its digits is 1296000, while the sum is 50.

The square root of 135565889 is about 11643.2765577392. The cubic root of 135565889 is about 513.7085674501.

The spelling of 135565889 in words is "one hundred thirty-five million, five hundred sixty-five thousand, eight hundred eighty-nine".