135022891 has 4 divisors (see below), whose sum is σ = 142965432. Its totient is φ = 127080352.

The previous prime is 135022883. The next prime is 135022957. The reversal of 135022891 is 198220531.

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 135022891 - 2³ = 135022883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135022861) 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, 3971245 + ... + 3971278.

It is an arithmetic number, because the mean of its divisors is an integer number (35741358).

Almost surely, 2^135022891 is an apocalyptic number.

135022891 is a deficient number, since it is larger than the sum of its proper divisors (7942541).

135022891 is an equidigital number, since it uses as much as digits as its factorization.

135022891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7942540.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 135022891 is about 11619.9350686654. The cubic root of 135022891 is about 513.0217772232.

The spelling of 135022891 in words is "one hundred thirty-five million, twenty-two thousand, eight hundred ninety-one".