135276389 has 4 divisors (see below), whose sum is σ = 136589856. Its totient is φ = 133962924.

The previous prime is 135276377. The next prime is 135276391. The reversal of 135276389 is 983672531.

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 a cyclic number.

It is not a de Polignac number, because 135276389 - 2¹⁶ = 135210853 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 (135276359) 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, 656579 + ... + 656784.

It is an arithmetic number, because the mean of its divisors is an integer number (34147464).

Almost surely, 2^135276389 is an apocalyptic number.

It is an amenable number.

135276389 is a deficient number, since it is larger than the sum of its proper divisors (1313467).

135276389 is a wasteful number, since it uses less digits than its factorization.

135276389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313466.

The product of its digits is 272160, while the sum is 44.

The square root of 135276389 is about 11630.8378460023. The cubic root of 135276389 is about 513.3426331686.

The spelling of 135276389 in words is "one hundred thirty-five million, two hundred seventy-six thousand, three hundred eighty-nine".