166231843 has 2 divisors, whose sum is σ = 166231844. Its totient is φ = 166231842.

The previous prime is 166231829. The next prime is 166231853. The reversal of 166231843 is 348132661.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (348132661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166231843 - 2⁵ = 166231811 is a prime.

It is a super-3 number, since 3×166231843³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166231799 and 166231808.

It is not a weakly prime, because it can be changed into another prime (166231853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83115921 + 83115922.

It is an arithmetic number, because the mean of its divisors is an integer number (83115922).

Almost surely, 2^166231843 is an apocalyptic number.

166231843 is a deficient number, since it is larger than the sum of its proper divisors (1).

166231843 is an equidigital number, since it uses as much as digits as its factorization.

166231843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 34.

The square root of 166231843 is about 12893.0928407423. The cubic root of 166231843 is about 549.8422059732.

The spelling of 166231843 in words is "one hundred sixty-six million, two hundred thirty-one thousand, eight hundred forty-three".