123732874118209 has 2 divisors, whose sum is σ = 123732874118210. Its totient is φ = 123732874118208.

The previous prime is 123732874118207. The next prime is 123732874118239. The reversal of 123732874118209 is 902811478237321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70494545586609 + 53238328531600 = 8396103^2 + 7296460^2 .

It is a cyclic number.

It is not a de Polignac number, because 123732874118209 - 2¹ = 123732874118207 is a prime.

Together with 123732874118207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (123732874118207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61866437059104 + 61866437059105.

It is an arithmetic number, because the mean of its divisors is an integer number (61866437059105).

Almost surely, 2^{123732874118209} is an apocalyptic number.

It is an amenable number.

123732874118209 is a deficient number, since it is larger than the sum of its proper divisors (1).

123732874118209 is an equidigital number, since it uses as much as digits as its factorization.

123732874118209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8128512, while the sum is 58.

The spelling of 123732874118209 in words is "one hundred twenty-three trillion, seven hundred thirty-two billion, eight hundred seventy-four million, one hundred eighteen thousand, two hundred nine".