166937231 has 2 divisors, whose sum is σ = 166937232. Its totient is φ = 166937230.

The previous prime is 166937219. The next prime is 166937237. The reversal of 166937231 is 132739661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166937231 - 2¹⁰ = 166936207 is a prime.

It is a super-2 number, since 2×166937231² = 55736078187894722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166937237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83468615 + 83468616.

It is an arithmetic number, because the mean of its divisors is an integer number (83468616).

Almost surely, 2^166937231 is an apocalyptic number.

166937231 is a deficient number, since it is larger than the sum of its proper divisors (1).

166937231 is an equidigital number, since it uses as much as digits as its factorization.

166937231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 38.

The square root of 166937231 is about 12920.4191495477. The cubic root of 166937231 is about 550.6188417307.

The spelling of 166937231 in words is "one hundred sixty-six million, nine hundred thirty-seven thousand, two hundred thirty-one".