1222331779 has 2 divisors, whose sum is σ = 1222331780. Its totient is φ = 1222331778.

The previous prime is 1222331771. The next prime is 1222331827. The reversal of 1222331779 is 9771332221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1222331779 - 2³ = 1222331771 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222331771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611165889 + 611165890.

It is an arithmetic number, because the mean of its divisors is an integer number (611165890).

Almost surely, 2^1222331779 is an apocalyptic number.

1222331779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222331779 is an equidigital number, since it uses as much as digits as its factorization.

1222331779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 37.

The square root of 1222331779 is about 34961.8617782291. The cubic root of 1222331779 is about 1069.2100551465.

The spelling of 1222331779 in words is "one billion, two hundred twenty-two million, three hundred thirty-one thousand, seven hundred seventy-nine".