231223123169 has 2 divisors, whose sum is σ = 231223123170. Its totient is φ = 231223123168.

The previous prime is 231223123123. The next prime is 231223123207. The reversal of 231223123169 is 961321322132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221382483169 + 9840640000 = 470513^2 + 99200^2 .

It is a cyclic number.

It is not a de Polignac number, because 231223123169 - 2¹⁶ = 231223057633 is a prime.

It is a super-4 number, since 4×231223123169⁴ (a number of 47 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (231223120169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115611561584 + 115611561585.

It is an arithmetic number, because the mean of its divisors is an integer number (115611561585).

Almost surely, 2^231223123169 is an apocalyptic number.

It is an amenable number.

231223123169 is a deficient number, since it is larger than the sum of its proper divisors (1).

231223123169 is an equidigital number, since it uses as much as digits as its factorization.

231223123169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 35.

The spelling of 231223123169 in words is "two hundred thirty-one billion, two hundred twenty-three million, one hundred twenty-three thousand, one hundred sixty-nine".