1226644403 has 2 divisors, whose sum is σ = 1226644404. Its totient is φ = 1226644402.

The previous prime is 1226644357. The next prime is 1226644453. The reversal of 1226644403 is 3044466221.

It is a weak prime.

It is an emirp because it is prime and its reverse (3044466221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1226644403 - 2⁶ = 1226644339 is a prime.

It is a super-2 number, since 2×1226644403² = 3009312982822452818, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1226644403.

It is not a weakly prime, because it can be changed into another prime (1226644453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613322201 + 613322202.

It is an arithmetic number, because the mean of its divisors is an integer number (613322202).

Almost surely, 2^1226644403 is an apocalyptic number.

1226644403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226644403 is an equidigital number, since it uses as much as digits as its factorization.

1226644403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 1226644403 is about 35023.4835931550. The cubic root of 1226644403 is about 1070.4660394532.

The spelling of 1226644403 in words is "one billion, two hundred twenty-six million, six hundred forty-four thousand, four hundred three".