284220491 has 2 divisors, whose sum is σ = 284220492. Its totient is φ = 284220490.

The previous prime is 284220451. The next prime is 284220511. The reversal of 284220491 is 194022482.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 284220491 - 2⁶ = 284220427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (284220401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142110245 + 142110246.

It is an arithmetic number, because the mean of its divisors is an integer number (142110246).

Almost surely, 2^284220491 is an apocalyptic number.

284220491 is a deficient number, since it is larger than the sum of its proper divisors (1).

284220491 is an equidigital number, since it uses as much as digits as its factorization.

284220491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 284220491 is about 16858.8401439719. The cubic root of 284220491 is about 657.4839088719.

The spelling of 284220491 in words is "two hundred eighty-four million, two hundred twenty thousand, four hundred ninety-one".