135499389 has 4 divisors (see below), whose sum is σ = 180665856. Its totient is φ = 90332924.

The previous prime is 135499387. The next prime is 135499391. The reversal of 135499389 is 983994531.

It is a happy number.

135499389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (135499387) and next prime (135499391).

It is a cyclic number.

It is not a de Polignac number, because 135499389 - 2¹ = 135499387 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135499387) 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, 22583229 + ... + 22583234.

It is an arithmetic number, because the mean of its divisors is an integer number (45166464).

Almost surely, 2^135499389 is an apocalyptic number.

It is an amenable number.

135499389 is a deficient number, since it is larger than the sum of its proper divisors (45166467).

135499389 is an equidigital number, since it uses as much as digits as its factorization.

135499389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45166466.

The product of its digits is 1049760, while the sum is 51.

The square root of 135499389 is about 11640.4204820960. The cubic root of 135499389 is about 513.6245561320.

The spelling of 135499389 in words is "one hundred thirty-five million, four hundred ninety-nine thousand, three hundred eighty-nine".