166439113 has 2 divisors, whose sum is σ = 166439114. Its totient is φ = 166439112.

The previous prime is 166439083. The next prime is 166439219. The reversal of 166439113 is 311934661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161112249 + 5326864 = 12693^2 + 2308^2 .

It is a cyclic number.

It is not a de Polignac number, because 166439113 - 2⁵ = 166439081 is a prime.

It is equal to p_9314890 and since 166439113 and 9314890 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (166469113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83219556 + 83219557.

It is an arithmetic number, because the mean of its divisors is an integer number (83219557).

Almost surely, 2^166439113 is an apocalyptic number.

It is an amenable number.

166439113 is a deficient number, since it is larger than the sum of its proper divisors (1).

166439113 is an equidigital number, since it uses as much as digits as its factorization.

166439113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 34.

The square root of 166439113 is about 12901.1283615039. The cubic root of 166439113 is about 550.0706388610.

The spelling of 166439113 in words is "one hundred sixty-six million, four hundred thirty-nine thousand, one hundred thirteen".