166043123 has 2 divisors, whose sum is σ = 166043124. Its totient is φ = 166043122.

The previous prime is 166043093. The next prime is 166043149. The reversal of 166043123 is 321340661.

It is an a-pointer prime, because the next prime (166043149) can be obtained adding 166043123 to its sum of digits (26).

It is a strong prime.

It is an emirp because it is prime and its reverse (321340661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166043123 - 2¹⁰ = 166042099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166043092 and 166043101.

It is not a weakly prime, because it can be changed into another prime (166043173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83021561 + 83021562.

It is an arithmetic number, because the mean of its divisors is an integer number (83021562).

Almost surely, 2^166043123 is an apocalyptic number.

166043123 is a deficient number, since it is larger than the sum of its proper divisors (1).

166043123 is an equidigital number, since it uses as much as digits as its factorization.

166043123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 166043123 is about 12885.7721150112. The cubic root of 166043123 is about 549.6340518835.

Adding to 166043123 its reverse (321340661), we get a palindrome (487383784).

The spelling of 166043123 in words is "one hundred sixty-six million, forty-three thousand, one hundred twenty-three".