123205219 has 2 divisors, whose sum is σ = 123205220. Its totient is φ = 123205218.

The previous prime is 123205213. The next prime is 123205223. The reversal of 123205219 is 912502321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123205219 - 2³ = 123205211 is a prime.

It is a super-2 number, since 2×123205219² = 30359051977675922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123205193 and 123205202.

It is not a weakly prime, because it can be changed into another prime (123205211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61602609 + 61602610.

It is an arithmetic number, because the mean of its divisors is an integer number (61602610).

Almost surely, 2^123205219 is an apocalyptic number.

123205219 is a deficient number, since it is larger than the sum of its proper divisors (1).

123205219 is an equidigital number, since it uses as much as digits as its factorization.

123205219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 123205219 is about 11099.7846375504. The cubic root of 123205219 is about 497.5954131285.

The spelling of 123205219 in words is "one hundred twenty-three million, two hundred five thousand, two hundred nineteen".