123185017 has 2 divisors, whose sum is σ = 123185018. Its totient is φ = 123185016.

The previous prime is 123184993. The next prime is 123185039. The reversal of 123185017 is 710581321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80622441 + 42562576 = 8979^2 + 6524^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123185017 is a prime.

It is not a weakly prime, because it can be changed into another prime (123185087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61592508 + 61592509.

It is an arithmetic number, because the mean of its divisors is an integer number (61592509).

Almost surely, 2^123185017 is an apocalyptic number.

It is an amenable number.

123185017 is a deficient number, since it is larger than the sum of its proper divisors (1).

123185017 is an equidigital number, since it uses as much as digits as its factorization.

123185017 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 28.

The square root of 123185017 is about 11098.8745825872. The cubic root of 123185017 is about 497.5682146811.

The spelling of 123185017 in words is "one hundred twenty-three million, one hundred eighty-five thousand, seventeen".