123739445503 has 2 divisors, whose sum is σ = 123739445504. Its totient is φ = 123739445502.

The previous prime is 123739445477. The next prime is 123739445563. The reversal of 123739445503 is 305544937321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123739445503 - 2²⁹ = 123202574591 is a prime.

It is a super-2 number, since 2×123739445503² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123739445563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61869722751 + 61869722752.

It is an arithmetic number, because the mean of its divisors is an integer number (61869722752).

Almost surely, 2^123739445503 is an apocalyptic number.

123739445503 is a deficient number, since it is larger than the sum of its proper divisors (1).

123739445503 is an equidigital number, since it uses as much as digits as its factorization.

123739445503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1360800, while the sum is 46.

The spelling of 123739445503 in words is "one hundred twenty-three billion, seven hundred thirty-nine million, four hundred forty-five thousand, five hundred three".