284277421 has 2 divisors, whose sum is σ = 284277422. Its totient is φ = 284277420.

The previous prime is 284277419. The next prime is 284277431. The reversal of 284277421 is 124772482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275925321 + 8352100 = 16611^2 + 2890^2 .

It is a cyclic number.

It is not a de Polignac number, because 284277421 - 2¹ = 284277419 is a prime.

It is a super-2 number, since 2×284277421² = 161627304180822482, which contains 22 as substring.

Together with 284277419, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (284277431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142138710 + 142138711.

It is an arithmetic number, because the mean of its divisors is an integer number (142138711).

Almost surely, 2^284277421 is an apocalyptic number.

It is an amenable number.

284277421 is a deficient number, since it is larger than the sum of its proper divisors (1).

284277421 is an equidigital number, since it uses as much as digits as its factorization.

284277421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50176, while the sum is 37.

The square root of 284277421 is about 16860.5284911239. The cubic root of 284277421 is about 657.5278044404.

The spelling of 284277421 in words is "two hundred eighty-four million, two hundred seventy-seven thousand, four hundred twenty-one".