123421416617 has 2 divisors, whose sum is σ = 123421416618. Its totient is φ = 123421416616.

The previous prime is 123421416607. The next prime is 123421416619. The reversal of 123421416617 is 716614124321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123412392601 + 9024016 = 351301^2 + 3004^2 .

It is a cyclic number.

It is not a de Polignac number, because 123421416617 - 2²⁴ = 123404639401 is a prime.

Together with 123421416619, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123421416619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61710708308 + 61710708309.

It is an arithmetic number, because the mean of its divisors is an integer number (61710708309).

Almost surely, 2^123421416617 is an apocalyptic number.

It is an amenable number.

123421416617 is a deficient number, since it is larger than the sum of its proper divisors (1).

123421416617 is an equidigital number, since it uses as much as digits as its factorization.

123421416617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 38.

The spelling of 123421416617 in words is "one hundred twenty-three billion, four hundred twenty-one million, four hundred sixteen thousand, six hundred seventeen".