284921449 has 2 divisors, whose sum is σ = 284921450. Its totient is φ = 284921448.

The previous prime is 284921393. The next prime is 284921459. The reversal of 284921449 is 944129482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164865600 + 120055849 = 12840^2 + 10957^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-284921449 is a prime.

It is not a weakly prime, because it can be changed into another prime (284921459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142460724 + 142460725.

It is an arithmetic number, because the mean of its divisors is an integer number (142460725).

Almost surely, 2^284921449 is an apocalyptic number.

It is an amenable number.

284921449 is a deficient number, since it is larger than the sum of its proper divisors (1).

284921449 is an equidigital number, since it uses as much as digits as its factorization.

284921449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 43.

The square root of 284921449 is about 16879.6163759725. The cubic root of 284921449 is about 658.0239710967.

The spelling of 284921449 in words is "two hundred eighty-four million, nine hundred twenty-one thousand, four hundred forty-nine".