123438017 has 2 divisors, whose sum is σ = 123438018. Its totient is φ = 123438016.

The previous prime is 123438013. The next prime is 123438023. The reversal of 123438017 is 710834321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95570176 + 27867841 = 9776^2 + 5279^2 .

It is a cyclic number.

It is not a de Polignac number, because 123438017 - 2² = 123438013 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123438013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61719008 + 61719009.

It is an arithmetic number, because the mean of its divisors is an integer number (61719009).

Almost surely, 2^123438017 is an apocalyptic number.

It is an amenable number.

123438017 is a deficient number, since it is larger than the sum of its proper divisors (1).

123438017 is an equidigital number, since it uses as much as digits as its factorization.

123438017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 123438017 is about 11110.2662884379. The cubic root of 123438017 is about 497.9086204598.

The spelling of 123438017 in words is "one hundred twenty-three million, four hundred thirty-eight thousand, seventeen".