284385989851 has 2 divisors, whose sum is σ = 284385989852. Its totient is φ = 284385989850.

The previous prime is 284385989777. The next prime is 284385989861. The reversal of 284385989851 is 158989583482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 284385989851 - 2²³ = 284377601243 is a prime.

It is not a weakly prime, because it can be changed into another prime (284385989861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142192994925 + 142192994926.

It is an arithmetic number, because the mean of its divisors is an integer number (142192994926).

Almost surely, 2^284385989851 is an apocalyptic number.

284385989851 is a deficient number, since it is larger than the sum of its proper divisors (1).

284385989851 is an equidigital number, since it uses as much as digits as its factorization.

284385989851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 199065600, while the sum is 70.

The spelling of 284385989851 in words is "two hundred eighty-four billion, three hundred eighty-five million, nine hundred eighty-nine thousand, eight hundred fifty-one".