284400689 has 2 divisors, whose sum is σ = 284400690. Its totient is φ = 284400688.

The previous prime is 284400673. The next prime is 284400751. The reversal of 284400689 is 986004482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255456289 + 28944400 = 15983^2 + 5380^2 .

It is a cyclic number.

It is not a de Polignac number, because 284400689 - 2⁴ = 284400673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (284400659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142200344 + 142200345.

It is an arithmetic number, because the mean of its divisors is an integer number (142200345).

Almost surely, 2^284400689 is an apocalyptic number.

It is an amenable number.

284400689 is a deficient number, since it is larger than the sum of its proper divisors (1).

284400689 is an equidigital number, since it uses as much as digits as its factorization.

284400689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 284400689 is about 16864.1836149871. The cubic root of 284400689 is about 657.6228294863.

The spelling of 284400689 in words is "two hundred eighty-four million, four hundred thousand, six hundred eighty-nine".