123330161 has 2 divisors, whose sum is σ = 123330162. Its totient is φ = 123330160.

The previous prime is 123330107. The next prime is 123330167. The reversal of 123330161 is 161033321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70040161 + 53290000 = 8369^2 + 7300^2 .

It is a cyclic number.

It is not a de Polignac number, because 123330161 - 2¹⁴ = 123313777 is a prime.

It is a super-2 number, since 2×123330161² = 30420657224571842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123330167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61665080 + 61665081.

It is an arithmetic number, because the mean of its divisors is an integer number (61665081).

Almost surely, 2^123330161 is an apocalyptic number.

It is an amenable number.

123330161 is a deficient number, since it is larger than the sum of its proper divisors (1).

123330161 is an equidigital number, since it uses as much as digits as its factorization.

123330161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 123330161 is about 11105.4113386223. The cubic root of 123330161 is about 497.7635595831.

Adding to 123330161 its reverse (161033321), we get a palindrome (284363482).

The spelling of 123330161 in words is "one hundred twenty-three million, three hundred thirty thousand, one hundred sixty-one".