231423169 has 2 divisors, whose sum is σ = 231423170. Its totient is φ = 231423168.

The previous prime is 231423167. The next prime is 231423187. The reversal of 231423169 is 961324132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231404944 + 18225 = 15212^2 + 135^2 .

It is a cyclic number.

It is not a de Polignac number, because 231423169 - 2¹ = 231423167 is a prime.

It is a super-2 number, since 2×231423169² = 107113366300005122, which contains 22 as substring.

Together with 231423167, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 231423169.

It is not a weakly prime, because it can be changed into another prime (231423163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115711584 + 115711585.

It is an arithmetic number, because the mean of its divisors is an integer number (115711585).

Almost surely, 2^231423169 is an apocalyptic number.

It is an amenable number.

231423169 is a deficient number, since it is larger than the sum of its proper divisors (1).

231423169 is an equidigital number, since it uses as much as digits as its factorization.

231423169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 231423169 is about 15212.5990218634. The cubic root of 231423169 is about 613.9536874390.

The spelling of 231423169 in words is "two hundred thirty-one million, four hundred twenty-three thousand, one hundred sixty-nine".