166397093 has 2 divisors, whose sum is σ = 166397094. Its totient is φ = 166397092.

The previous prime is 166397069. The next prime is 166397141. The reversal of 166397093 is 390793661.

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., 163891204 + 2505889 = 12802^2 + 1583^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166397093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166397053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83198546 + 83198547.

It is an arithmetic number, because the mean of its divisors is an integer number (83198547).

Almost surely, 2^166397093 is an apocalyptic number.

It is an amenable number.

166397093 is a deficient number, since it is larger than the sum of its proper divisors (1).

166397093 is an equidigital number, since it uses as much as digits as its factorization.

166397093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 166397093 is about 12899.4997189814. The cubic root of 166397093 is about 550.0243438261.

It can be divided in two parts, 16639 and 7093, that added together give a palindrome (23732).

The spelling of 166397093 in words is "one hundred sixty-six million, three hundred ninety-seven thousand, ninety-three".