168697231 has 2 divisors, whose sum is σ = 168697232. Its totient is φ = 168697230.

The previous prime is 168697183. The next prime is 168697237. The reversal of 168697231 is 132796861.

168697231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168697231 - 2⁹ = 168696719 is a prime.

It is a super-2 number, since 2×168697231² = 56917511494134722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168697237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84348615 + 84348616.

It is an arithmetic number, because the mean of its divisors is an integer number (84348616).

Almost surely, 2^168697231 is an apocalyptic number.

168697231 is a deficient number, since it is larger than the sum of its proper divisors (1).

168697231 is an equidigital number, since it uses as much as digits as its factorization.

168697231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 168697231 is about 12988.3498182025. The cubic root of 168697231 is about 552.5471180034.

The spelling of 168697231 in words is "one hundred sixty-eight million, six hundred ninety-seven thousand, two hundred thirty-one".