822127091 has 2 divisors, whose sum is σ = 822127092. Its totient is φ = 822127090.

The previous prime is 822127081. The next prime is 822127109. The reversal of 822127091 is 190721228.

It is a happy number.

Together with next prime (822127109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 822127091 - 2⁶ = 822127027 is a prime.

It is a super-2 number, since 2×822127091² = 1351785907512244562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (822127001) 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, 411063545 + 411063546.

It is an arithmetic number, because the mean of its divisors is an integer number (411063546).

Almost surely, 2^822127091 is an apocalyptic number.

822127091 is a deficient number, since it is larger than the sum of its proper divisors (1).

822127091 is an equidigital number, since it uses as much as digits as its factorization.

822127091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 822127091 is about 28672.7586918315. The cubic root of 822127091 is about 936.7987872010.

The spelling of 822127091 in words is "eight hundred twenty-two million, one hundred twenty-seven thousand, ninety-one".