1222445797 has 2 divisors, whose sum is σ = 1222445798. Its totient is φ = 1222445796.

The previous prime is 1222445779. The next prime is 1222445801. The reversal of 1222445797 is 7975442221.

Together with previous prime (1222445779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1088604036 + 133841761 = 32994^2 + 11569^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222445797 - 2⁷ = 1222445669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222440797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611222898 + 611222899.

It is an arithmetic number, because the mean of its divisors is an integer number (611222899).

Almost surely, 2^1222445797 is an apocalyptic number.

It is an amenable number.

1222445797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222445797 is an equidigital number, since it uses as much as digits as its factorization.

1222445797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 43.

The square root of 1222445797 is about 34963.4923455881. The cubic root of 1222445797 is about 1069.2432990943.

The spelling of 1222445797 in words is "one billion, two hundred twenty-two million, four hundred forty-five thousand, seven hundred ninety-seven".