166723 has 2 divisors, whose sum is σ = 166724. Its totient is φ = 166722.

The previous prime is 166703. The next prime is 166739. The reversal of 166723 is 327661.

It is a strong prime.

It is an emirp because it is prime and its reverse (327661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166723 is a prime.

It is not a weakly prime, because it can be changed into another prime (166703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83361 + 83362.

It is an arithmetic number, because the mean of its divisors is an integer number (83362).

2¹⁶⁶⁷²³ is an apocalyptic number.

166723 is a deficient number, since it is larger than the sum of its proper divisors (1).

166723 is an equidigital number, since it uses as much as digits as its factorization.

166723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 25.

The square root of 166723 is about 408.3172785959. The cubic root of 166723 is about 55.0383204021.

The spelling of 166723 in words is "one hundred sixty-six thousand, seven hundred twenty-three".