135889999 has 4 divisors (see below), whose sum is σ = 155302864. Its totient is φ = 116477136.

The previous prime is 135889991. The next prime is 135890023. The reversal of 135889999 is 999988531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999988531 = 28751 ⋅34781.

It is a cyclic number.

It is not a de Polignac number, because 135889999 - 2³ = 135889991 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135889991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9706422 + ... + 9706435.

It is an arithmetic number, because the mean of its divisors is an integer number (38825716).

Almost surely, 2^135889999 is an apocalyptic number.

135889999 is a deficient number, since it is larger than the sum of its proper divisors (19412865).

135889999 is an equidigital number, since it uses as much as digits as its factorization.

135889999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19412864.

The product of its digits is 6298560, while the sum is 61.

The square root of 135889999 is about 11657.1865816757. The cubic root of 135889999 is about 514.1176319365.

The spelling of 135889999 in words is "one hundred thirty-five million, eight hundred eighty-nine thousand, nine hundred ninety-nine".