284821423 has 2 divisors, whose sum is σ = 284821424. Its totient is φ = 284821422.

The previous prime is 284821421. The next prime is 284821501. The reversal of 284821423 is 324128482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 284821423 - 2¹ = 284821421 is a prime.

It is a super-2 number, since 2×284821423² = 162246485999489858, which contains 22 as substring.

Together with 284821421, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (284821421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142410711 + 142410712.

It is an arithmetic number, because the mean of its divisors is an integer number (142410712).

Almost surely, 2^284821423 is an apocalyptic number.

284821423 is a deficient number, since it is larger than the sum of its proper divisors (1).

284821423 is an equidigital number, since it uses as much as digits as its factorization.

284821423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24576, while the sum is 34.

The square root of 284821423 is about 16876.6531930949. The cubic root of 284821423 is about 657.9469589824.

The spelling of 284821423 in words is "two hundred eighty-four million, eight hundred twenty-one thousand, four hundred twenty-three".