123420169 has 2 divisors, whose sum is σ = 123420170. Its totient is φ = 123420168.

The previous prime is 123420137. The next prime is 123420173. The reversal of 123420169 is 961024321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113103225 + 10316944 = 10635^2 + 3212^2 .

It is a cyclic number.

It is not a de Polignac number, because 123420169 - 2⁵ = 123420137 is a prime.

It is a super-2 number, since 2×123420169² = 30465076231977122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123420469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61710084 + 61710085.

It is an arithmetic number, because the mean of its divisors is an integer number (61710085).

Almost surely, 2^123420169 is an apocalyptic number.

It is an amenable number.

123420169 is a deficient number, since it is larger than the sum of its proper divisors (1).

123420169 is an equidigital number, since it uses as much as digits as its factorization.

123420169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 123420169 is about 11109.4630383291. The cubic root of 123420169 is about 497.8846216367.

The spelling of 123420169 in words is "one hundred twenty-three million, four hundred twenty thousand, one hundred sixty-nine".