123932289809 has 2 divisors, whose sum is σ = 123932289810. Its totient is φ = 123932289808.

The previous prime is 123932289799. The next prime is 123932289829. The reversal of 123932289809 is 908982239321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89176890625 + 34755399184 = 298625^2 + 186428^2 .

It is a cyclic number.

It is not a de Polignac number, because 123932289809 - 2¹² = 123932285713 is a prime.

It is not a weakly prime, because it can be changed into another prime (123932289829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61966144904 + 61966144905.

It is an arithmetic number, because the mean of its divisors is an integer number (61966144905).

Almost surely, 2^123932289809 is an apocalyptic number.

It is an amenable number.

123932289809 is a deficient number, since it is larger than the sum of its proper divisors (1).

123932289809 is an equidigital number, since it uses as much as digits as its factorization.

123932289809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3359232, while the sum is 56.

The spelling of 123932289809 in words is "one hundred twenty-three billion, nine hundred thirty-two million, two hundred eighty-nine thousand, eight hundred nine".