196281891 has 24 divisors (see below), whose sum is σ = 305934720. Its totient is φ = 120548736.

The previous prime is 196281853. The next prime is 196281893. The reversal of 196281891 is 198182691.

196281891 is a `hidden beast` number, since 1 + 9 + 628 + 18 + 9 + 1 = 666.

It is not a de Polignac number, because 196281891 - 2¹⁴ = 196265507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (196281893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70830 + ... + 73548.

It is an arithmetic number, because the mean of its divisors is an integer number (12747280).

Almost surely, 2^196281891 is an apocalyptic number.

196281891 is a deficient number, since it is larger than the sum of its proper divisors (109652829).

196281891 is a wasteful number, since it uses less digits than its factorization.

196281891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3355 (or 3352 counting only the distinct ones).

The product of its digits is 62208, while the sum is 45.

The square root of 196281891 is about 14010.0639184837. The cubic root of 196281891 is about 581.1569169013.

The spelling of 196281891 in words is "one hundred ninety-six million, two hundred eighty-one thousand, eight hundred ninety-one".