1223239109 has 2 divisors, whose sum is σ = 1223239110. Its totient is φ = 1223239108.

The previous prime is 1223239091. The next prime is 1223239123. The reversal of 1223239109 is 9019323221.

Together with previous prime (1223239091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1025920900 + 197318209 = 32030^2 + 14047^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223239109 - 2²⁰ = 1222190533 is a prime.

It is a super-2 number, since 2×1223239109² = 2992627835574227762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223239139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611619554 + 611619555.

It is an arithmetic number, because the mean of its divisors is an integer number (611619555).

Almost surely, 2^1223239109 is an apocalyptic number.

It is an amenable number.

1223239109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223239109 is an equidigital number, since it uses as much as digits as its factorization.

1223239109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 1223239109 is about 34974.8353677326. The cubic root of 1223239109 is about 1069.4745459160.

The spelling of 1223239109 in words is "one billion, two hundred twenty-three million, two hundred thirty-nine thousand, one hundred nine".