1220783579 has 2 divisors, whose sum is σ = 1220783580. Its totient is φ = 1220783578.

The previous prime is 1220783561. The next prime is 1220783591. The reversal of 1220783579 is 9753870221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220783579 - 2²⁰ = 1219735003 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220786579) 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, 610391789 + 610391790.

It is an arithmetic number, because the mean of its divisors is an integer number (610391790).

Almost surely, 2^1220783579 is an apocalyptic number.

1220783579 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220783579 is an equidigital number, since it uses as much as digits as its factorization.

1220783579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 1220783579 is about 34939.7134933874. The cubic root of 1220783579 is about 1068.7584455222.

The spelling of 1220783579 in words is "one billion, two hundred twenty million, seven hundred eighty-three thousand, five hundred seventy-nine".