1226167609 has 2 divisors, whose sum is σ = 1226167610. Its totient is φ = 1226167608.

The previous prime is 1226167567. The next prime is 1226167643. The reversal of 1226167609 is 9067616221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1060479225 + 165688384 = 32565^2 + 12872^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226167609 - 2⁹ = 1226167097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1226167669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613083804 + 613083805.

It is an arithmetic number, because the mean of its divisors is an integer number (613083805).

Almost surely, 2^1226167609 is an apocalyptic number.

It is an amenable number.

1226167609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226167609 is an equidigital number, since it uses as much as digits as its factorization.

1226167609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 1226167609 is about 35016.6761557975. The cubic root of 1226167609 is about 1070.3273255420.

The spelling of 1226167609 in words is "one billion, two hundred twenty-six million, one hundred sixty-seven thousand, six hundred nine".