284723009 has 2 divisors, whose sum is σ = 284723010. Its totient is φ = 284723008.

The previous prime is 284722931. The next prime is 284723027. The reversal of 284723009 is 900327482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143041600 + 141681409 = 11960^2 + 11903^2 .

It is a cyclic number.

It is not a de Polignac number, because 284723009 - 2¹² = 284718913 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 284723009.

It is not a weakly prime, because it can be changed into another prime (284723099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142361504 + 142361505.

It is an arithmetic number, because the mean of its divisors is an integer number (142361505).

Almost surely, 2^284723009 is an apocalyptic number.

It is an amenable number.

284723009 is a deficient number, since it is larger than the sum of its proper divisors (1).

284723009 is an equidigital number, since it uses as much as digits as its factorization.

284723009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 284723009 is about 16873.7372564586. The cubic root of 284723009 is about 657.8711703818.

The spelling of 284723009 in words is "two hundred eighty-four million, seven hundred twenty-three thousand, nine".