2104517123 has 2 divisors, whose sum is σ = 2104517124. Its totient is φ = 2104517122.

The previous prime is 2104517087. The next prime is 2104517131. The reversal of 2104517123 is 3217154012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2104517123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2104517092 and 2104517101.

It is not a weakly prime, because it can be changed into another prime (2104517183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052258561 + 1052258562.

It is an arithmetic number, because the mean of its divisors is an integer number (1052258562).

Almost surely, 2^2104517123 is an apocalyptic number.

2104517123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2104517123 is an equidigital number, since it uses as much as digits as its factorization.

2104517123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 2104517123 is about 45875.0163269726. The cubic root of 2104517123 is about 1281.4966873711.

The spelling of 2104517123 in words is "two billion, one hundred four million, five hundred seventeen thousand, one hundred twenty-three".