135789891 has 8 divisors (see below), whose sum is σ = 181329744. Its totient is φ = 90388320.

The previous prime is 135789887. The next prime is 135789959. The reversal of 135789891 is 198987531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135789891 - 2² = 135789887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135789821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32256 + ... + 36221.

It is an arithmetic number, because the mean of its divisors is an integer number (22666218).

Almost surely, 2^135789891 is an apocalyptic number.

135789891 is a deficient number, since it is larger than the sum of its proper divisors (45539853).

135789891 is an equidigital number, since it uses as much as digits as its factorization.

135789891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69141.

The product of its digits is 544320, while the sum is 51.

The square root of 135789891 is about 11652.8919586513. The cubic root of 135789891 is about 513.9913534960.

The spelling of 135789891 in words is "one hundred thirty-five million, seven hundred eighty-nine thousand, eight hundred ninety-one".