194192281 has 2 divisors, whose sum is σ = 194192282. Its totient is φ = 194192280.

The previous prime is 194192279. The next prime is 194192291. The reversal of 194192281 is 182291491.

194192281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185096025 + 9096256 = 13605^2 + 3016^2 .

It is a cyclic number.

It is not a de Polignac number, because 194192281 - 2¹ = 194192279 is a prime.

It is a super-2 number, since 2×194192281² = 75421283999965922, which contains 22 as substring.

Together with 194192279, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 194192281.

It is not a weakly prime, because it can be changed into another prime (194192291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97096140 + 97096141.

It is an arithmetic number, because the mean of its divisors is an integer number (97096141).

Almost surely, 2^194192281 is an apocalyptic number.

It is an amenable number.

194192281 is a deficient number, since it is larger than the sum of its proper divisors (1).

194192281 is an equidigital number, since it uses as much as digits as its factorization.

194192281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 37.

The square root of 194192281 is about 13935.2890533351. The cubic root of 194192281 is about 579.0872295677.

The spelling of 194192281 in words is "one hundred ninety-four million, one hundred ninety-two thousand, two hundred eighty-one".