1222311689 has 2 divisors, whose sum is σ = 1222311690. Its totient is φ = 1222311688.

The previous prime is 1222311683. The next prime is 1222311719. The reversal of 1222311689 is 9861132221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 908419600 + 313892089 = 30140^2 + 17717^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222311689 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222311683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611155844 + 611155845.

It is an arithmetic number, because the mean of its divisors is an integer number (611155845).

Almost surely, 2^1222311689 is an apocalyptic number.

It is an amenable number.

1222311689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222311689 is an equidigital number, since it uses as much as digits as its factorization.

1222311689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 35.

The square root of 1222311689 is about 34961.5744639740. The cubic root of 1222311689 is about 1069.2041973404.

The spelling of 1222311689 in words is "one billion, two hundred twenty-two million, three hundred eleven thousand, six hundred eighty-nine".