123116519 has 2 divisors, whose sum is σ = 123116520. Its totient is φ = 123116518.

The previous prime is 123116489. The next prime is 123116569. The reversal of 123116519 is 915611321.

It is a weak prime.

It is an emirp because it is prime and its reverse (915611321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123116519 - 2²⁰ = 122067943 is a prime.

It is a super-2 number, since 2×123116519² = 30315354501354722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 123116491 and 123116500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123116569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61558259 + 61558260.

It is an arithmetic number, because the mean of its divisors is an integer number (61558260).

Almost surely, 2^123116519 is an apocalyptic number.

123116519 is a deficient number, since it is larger than the sum of its proper divisors (1).

123116519 is an equidigital number, since it uses as much as digits as its factorization.

123116519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 29.

The square root of 123116519 is about 11095.7883451335. The cubic root of 123116519 is about 497.4759720052.

The spelling of 123116519 in words is "one hundred twenty-three million, one hundred sixteen thousand, five hundred nineteen".