123655023673 has 2 divisors, whose sum is σ = 123655023674. Its totient is φ = 123655023672.

The previous prime is 123655023659. The next prime is 123655023677. The reversal of 123655023673 is 376320556321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87056272809 + 36598750864 = 295053^2 + 191308^2 .

It is a cyclic number.

It is not a de Polignac number, because 123655023673 - 2¹³ = 123655015481 is a prime.

It is not a weakly prime, because it can be changed into another prime (123655023677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61827511836 + 61827511837.

It is an arithmetic number, because the mean of its divisors is an integer number (61827511837).

Almost surely, 2^123655023673 is an apocalyptic number.

It is an amenable number.

123655023673 is a deficient number, since it is larger than the sum of its proper divisors (1).

123655023673 is an equidigital number, since it uses as much as digits as its factorization.

123655023673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 43.

Adding to 123655023673 its reverse (376320556321), we get a palindrome (499975579994).

The spelling of 123655023673 in words is "one hundred twenty-three billion, six hundred fifty-five million, twenty-three thousand, six hundred seventy-three".