135889247 has 4 divisors (see below), whose sum is σ = 146342280. Its totient is φ = 125436216.

The previous prime is 135889241. The next prime is 135889249. The reversal of 135889247 is 742988531.

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: 742988531 = 4817 ⋅154243.

It is a cyclic number.

It is not a de Polignac number, because 135889247 - 2¹⁸ = 135627103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135889241) 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, 5226497 + ... + 5226522.

It is an arithmetic number, because the mean of its divisors is an integer number (36585570).

Almost surely, 2^135889247 is an apocalyptic number.

135889247 is a deficient number, since it is larger than the sum of its proper divisors (10453033).

135889247 is a wasteful number, since it uses less digits than its factorization.

135889247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10453032.

The product of its digits is 483840, while the sum is 47.

The square root of 135889247 is about 11657.1543268501. The cubic root of 135889247 is about 514.1166835783.

The spelling of 135889247 in words is "one hundred thirty-five million, eight hundred eighty-nine thousand, two hundred forty-seven".