284843019491 has 2 divisors, whose sum is σ = 284843019492. Its totient is φ = 284843019490.

The previous prime is 284843019463. The next prime is 284843019569. The reversal of 284843019491 is 194910348482.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-284843019491 is a prime.

It is a super-2 number, since 2×284843019491² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (284843019401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142421509745 + 142421509746.

It is an arithmetic number, because the mean of its divisors is an integer number (142421509746).

Almost surely, 2^284843019491 is an apocalyptic number.

284843019491 is a deficient number, since it is larger than the sum of its proper divisors (1).

284843019491 is an equidigital number, since it uses as much as digits as its factorization.

284843019491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 284843019491 in words is "two hundred eighty-four billion, eight hundred forty-three million, nineteen thousand, four hundred ninety-one".