135788889 has 4 divisors (see below), whose sum is σ = 181051856. Its totient is φ = 90525924.

The previous prime is 135788881. The next prime is 135788893. The reversal of 135788889 is 988887531.

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 not a de Polignac number, because 135788889 - 2³ = 135788881 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (135788881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22631479 + ... + 22631484.

It is an arithmetic number, because the mean of its divisors is an integer number (45262964).

Almost surely, 2^135788889 is an apocalyptic number.

It is an amenable number.

135788889 is a deficient number, since it is larger than the sum of its proper divisors (45262967).

135788889 is an equidigital number, since it uses as much as digits as its factorization.

135788889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45262966.

The product of its digits is 3870720, while the sum is 57.

The square root of 135788889 is about 11652.8489649527. The cubic root of 135788889 is about 513.9900892375.

The spelling of 135788889 in words is "one hundred thirty-five million, seven hundred eighty-eight thousand, eight hundred eighty-nine".