135289291 has 4 divisors (see below), whose sum is σ = 142409800. Its totient is φ = 128168784.

The previous prime is 135289267. The next prime is 135289313. The reversal of 135289291 is 192982531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135289291 - 2¹⁹ = 134765003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135289201) 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, 3560226 + ... + 3560263.

It is an arithmetic number, because the mean of its divisors is an integer number (35602450).

Almost surely, 2^135289291 is an apocalyptic number.

135289291 is a deficient number, since it is larger than the sum of its proper divisors (7120509).

135289291 is an equidigital number, since it uses as much as digits as its factorization.

135289291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7120508.

The product of its digits is 38880, while the sum is 40.

The square root of 135289291 is about 11631.3924789769. The cubic root of 135289291 is about 513.3589526859.

The spelling of 135289291 in words is "one hundred thirty-five million, two hundred eighty-nine thousand, two hundred ninety-one".