123503503117 has 2 divisors, whose sum is σ = 123503503118. Its totient is φ = 123503503116.

The previous prime is 123503503033. The next prime is 123503503139. The reversal of 123503503117 is 711305305321.

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., 78852009636 + 44651493481 = 280806^2 + 211309^2 .

It is a cyclic number.

It is not a de Polignac number, because 123503503117 - 2⁷ = 123503502989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123503503517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61751751558 + 61751751559.

It is an arithmetic number, because the mean of its divisors is an integer number (61751751559).

Almost surely, 2^123503503117 is an apocalyptic number.

It is an amenable number.

123503503117 is a deficient number, since it is larger than the sum of its proper divisors (1).

123503503117 is an equidigital number, since it uses as much as digits as its factorization.

123503503117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9450, while the sum is 31.

Adding to 123503503117 its reverse (711305305321), we get a palindrome (834808808438).

The spelling of 123503503117 in words is "one hundred twenty-three billion, five hundred three million, five hundred three thousand, one hundred seventeen".