1228500109 has 2 divisors, whose sum is σ = 1228500110. Its totient is φ = 1228500108.

The previous prime is 1228500061. The next prime is 1228500113. The reversal of 1228500109 is 9010058221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1184874084 + 43626025 = 34422^2 + 6605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1228500109 - 2²⁵ = 1194945677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1228500709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614250054 + 614250055.

It is an arithmetic number, because the mean of its divisors is an integer number (614250055).

Almost surely, 2^1228500109 is an apocalyptic number.

It is an amenable number.

1228500109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228500109 is an equidigital number, since it uses as much as digits as its factorization.

1228500109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1228500109 is about 35049.9658915669. The cubic root of 1228500109 is about 1071.0055789636.

The spelling of 1228500109 in words is "one billion, two hundred twenty-eight million, five hundred thousand, one hundred nine".