133022891 has 4 divisors (see below), whose sum is σ = 137313984. Its totient is φ = 128731800.

The previous prime is 133022887. The next prime is 133022893. The reversal of 133022891 is 198220331.

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 133022891 - 2² = 133022887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133022893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2145500 + ... + 2145561.

It is an arithmetic number, because the mean of its divisors is an integer number (34328496).

Almost surely, 2^133022891 is an apocalyptic number.

133022891 is a deficient number, since it is larger than the sum of its proper divisors (4291093).

133022891 is an equidigital number, since it uses as much as digits as its factorization.

133022891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4291092.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 133022891 is about 11533.5550026867. Note that the first 3 decimals coincide. The cubic root of 133022891 is about 510.4761553306.

The spelling of 133022891 in words is "one hundred thirty-three million, twenty-two thousand, eight hundred ninety-one".