285492191 has 2 divisors, whose sum is σ = 285492192. Its totient is φ = 285492190.

The previous prime is 285492187. The next prime is 285492197. The reversal of 285492191 is 191294582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 285492191 - 2² = 285492187 is a prime.

It is a super-2 number, since 2×285492191² = 163011582243960962, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285492197) 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 as a sum of consecutive naturals, namely, 142746095 + 142746096.

It is an arithmetic number, because the mean of its divisors is an integer number (142746096).

Almost surely, 2^285492191 is an apocalyptic number.

285492191 is a deficient number, since it is larger than the sum of its proper divisors (1).

285492191 is an equidigital number, since it uses as much as digits as its factorization.

285492191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 41.

The square root of 285492191 is about 16896.5141671293. The cubic root of 285492191 is about 658.4630528479.

The spelling of 285492191 in words is "two hundred eighty-five million, four hundred ninety-two thousand, one hundred ninety-one".