284947231 has 2 divisors, whose sum is σ = 284947232. Its totient is φ = 284947230.

The previous prime is 284947193. The next prime is 284947261. The reversal of 284947231 is 132749482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 284947231 - 2¹⁵ = 284914463 is a prime.

It is a super-2 number, since 2×284947231² = 162389848909134722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (284947261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142473615 + 142473616.

It is an arithmetic number, because the mean of its divisors is an integer number (142473616).

Almost surely, 2^284947231 is an apocalyptic number.

284947231 is a deficient number, since it is larger than the sum of its proper divisors (1).

284947231 is an equidigital number, since it uses as much as digits as its factorization.

284947231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 40.

The square root of 284947231 is about 16880.3800608873. The cubic root of 284947231 is about 658.0438182772.

The spelling of 284947231 in words is "two hundred eighty-four million, nine hundred forty-seven thousand, two hundred thirty-one".