822264991 has 2 divisors, whose sum is σ = 822264992. Its totient is φ = 822264990.

The previous prime is 822264977. The next prime is 822265007. The reversal of 822264991 is 199462228.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 822264991 - 2⁹ = 822264479 is a prime.

It is a super-2 number, since 2×822264991² = 1352239430848460162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (822264931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411132495 + 411132496.

It is an arithmetic number, because the mean of its divisors is an integer number (411132496).

Almost surely, 2^822264991 is an apocalyptic number.

822264991 is a deficient number, since it is larger than the sum of its proper divisors (1).

822264991 is an equidigital number, since it uses as much as digits as its factorization.

822264991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 43.

The square root of 822264991 is about 28675.1633125254. The cubic root of 822264991 is about 936.8511624489.

The spelling of 822264991 in words is "eight hundred twenty-two million, two hundred sixty-four thousand, nine hundred ninety-one".