231406169 has 2 divisors, whose sum is σ = 231406170. Its totient is φ = 231406168.

The previous prime is 231406127. The next prime is 231406181. The reversal of 231406169 is 961604132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231404944 + 1225 = 15212^2 + 35^2 .

It is a cyclic number.

It is not a de Polignac number, because 231406169 - 2⁸ = 231405913 is a prime.

It is a super-2 number, since 2×231406169² = 107097630102513122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231406199) 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, 115703084 + 115703085.

It is an arithmetic number, because the mean of its divisors is an integer number (115703085).

Almost surely, 2^231406169 is an apocalyptic number.

It is an amenable number.

231406169 is a deficient number, since it is larger than the sum of its proper divisors (1).

231406169 is an equidigital number, since it uses as much as digits as its factorization.

231406169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 231406169 is about 15212.0402642118. The cubic root of 231406169 is about 613.9386536976.

The spelling of 231406169 in words is "two hundred thirty-one million, four hundred six thousand, one hundred sixty-nine".