1226005909 has 2 divisors, whose sum is σ = 1226005910. Its totient is φ = 1226005908.

The previous prime is 1226005901. The next prime is 1226005927. The reversal of 1226005909 is 9095006221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1225700100 + 305809 = 35010^2 + 553^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226005909 - 2³ = 1226005901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1226005901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613002954 + 613002955.

It is an arithmetic number, because the mean of its divisors is an integer number (613002955).

Almost surely, 2^1226005909 is an apocalyptic number.

It is an amenable number.

1226005909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226005909 is an equidigital number, since it uses as much as digits as its factorization.

1226005909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 1226005909 is about 35014.3671797735. The cubic root of 1226005909 is about 1070.2802739166.

The spelling of 1226005909 in words is "one billion, two hundred twenty-six million, five thousand, nine hundred nine".