1222688449 has 2 divisors, whose sum is σ = 1222688450. Its totient is φ = 1222688448.

The previous prime is 1222688431. The next prime is 1222688483. The reversal of 1222688449 is 9448862221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1035874225 + 186814224 = 32185^2 + 13668^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222688449 - 2⁷ = 1222688321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222688399 and 1222688408.

It is not a weakly prime, because it can be changed into another prime (1222688549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611344224 + 611344225.

It is an arithmetic number, because the mean of its divisors is an integer number (611344225).

Almost surely, 2^1222688449 is an apocalyptic number.

It is an amenable number.

1222688449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222688449 is an equidigital number, since it uses as much as digits as its factorization.

1222688449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 442368, while the sum is 46.

The square root of 1222688449 is about 34966.9622501012. The cubic root of 1222688449 is about 1069.3140416610.

The spelling of 1222688449 in words is "one billion, two hundred twenty-two million, six hundred eighty-eight thousand, four hundred forty-nine".