284940869 has 2 divisors, whose sum is σ = 284940870. Its totient is φ = 284940868.

The previous prime is 284940847. The next prime is 284940889. The reversal of 284940869 is 968049482.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219928900 + 65011969 = 14830^2 + 8063^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-284940869 is a prime.

It is a super-2 number, since 2×284940869² = 162382597652950322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (284940829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142470434 + 142470435.

It is an arithmetic number, because the mean of its divisors is an integer number (142470435).

Almost surely, 2^284940869 is an apocalyptic number.

It is an amenable number.

284940869 is a deficient number, since it is larger than the sum of its proper divisors (1).

284940869 is an equidigital number, since it uses as much as digits as its factorization.

284940869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 50.

The square root of 284940869 is about 16880.1916162110. The cubic root of 284940869 is about 658.0389208723.

The spelling of 284940869 in words is "two hundred eighty-four million, nine hundred forty thousand, eight hundred sixty-nine".