1226644393 has 4 divisors (see below), whose sum is σ = 1321001668. Its totient is φ = 1132287120.

The previous prime is 1226644357. The next prime is 1226644403. The reversal of 1226644393 is 3934466221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 360696064 + 865948329 = 18992^2 + 29427^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226644393 - 2²⁹ = 689773481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1226644343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47178618 + ... + 47178643.

It is an arithmetic number, because the mean of its divisors is an integer number (330250417).

Almost surely, 2^1226644393 is an apocalyptic number.

1226644393 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1226644393 is a deficient number, since it is larger than the sum of its proper divisors (94357275).

1226644393 is an equidigital number, since it uses as much as digits as its factorization.

1226644393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94357274.

The product of its digits is 186624, while the sum is 40.

The square root of 1226644393 is about 35023.4834503937. The cubic root of 1226644393 is about 1070.4660365443.

The spelling of 1226644393 in words is "one billion, two hundred twenty-six million, six hundred forty-four thousand, three hundred ninety-three".