123363362809 has 2 divisors, whose sum is σ = 123363362810. Its totient is φ = 123363362808.

The previous prime is 123363362803. The next prime is 123363362813. The reversal of 123363362809 is 908263363321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78980671225 + 44382691584 = 281035^2 + 210672^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123363362809 is a prime.

It is not a weakly prime, because it can be changed into another prime (123363362803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61681681404 + 61681681405.

It is an arithmetic number, because the mean of its divisors is an integer number (61681681405).

Almost surely, 2^123363362809 is an apocalyptic number.

It is an amenable number.

123363362809 is a deficient number, since it is larger than the sum of its proper divisors (1).

123363362809 is an equidigital number, since it uses as much as digits as its factorization.

123363362809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 46.

The spelling of 123363362809 in words is "one hundred twenty-three billion, three hundred sixty-three million, three hundred sixty-two thousand, eight hundred nine".