1220857633 has 2 divisors, whose sum is σ = 1220857634. Its totient is φ = 1220857632.

The previous prime is 1220857607. The next prime is 1220857699. The reversal of 1220857633 is 3367580221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1218568464 + 2289169 = 34908^2 + 1513^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220857633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220857592 and 1220857601.

It is not a weakly prime, because it can be changed into another prime (1220857933) 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, 610428816 + 610428817.

It is an arithmetic number, because the mean of its divisors is an integer number (610428817).

Almost surely, 2^1220857633 is an apocalyptic number.

It is an amenable number.

1220857633 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220857633 is an equidigital number, since it uses as much as digits as its factorization.

1220857633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 1220857633 is about 34940.7732169739. The cubic root of 1220857633 is about 1068.7800557511.

The spelling of 1220857633 in words is "one billion, two hundred twenty million, eight hundred fifty-seven thousand, six hundred thirty-three".