284066921 has 2 divisors, whose sum is σ = 284066922. Its totient is φ = 284066920.

The previous prime is 284066903. The next prime is 284066947. The reversal of 284066921 is 129660482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 270109225 + 13957696 = 16435^2 + 3736^2 .

It is a cyclic number.

It is not a de Polignac number, because 284066921 - 2¹⁴ = 284050537 is a prime.

It is not a weakly prime, because it can be changed into another prime (284060921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142033460 + 142033461.

It is an arithmetic number, because the mean of its divisors is an integer number (142033461).

Almost surely, 2^284066921 is an apocalyptic number.

It is an amenable number.

284066921 is a deficient number, since it is larger than the sum of its proper divisors (1).

284066921 is an equidigital number, since it uses as much as digits as its factorization.

284066921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 284066921 is about 16854.2849447848. The cubic root of 284066921 is about 657.3654703147.

The spelling of 284066921 in words is "two hundred eighty-four million, sixty-six thousand, nine hundred twenty-one".