210023173 has 2 divisors, whose sum is σ = 210023174. Its totient is φ = 210023172.

The previous prime is 210023167. The next prime is 210023201. The reversal of 210023173 is 371320012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209728324 + 294849 = 14482^2 + 543^2 .

It is a cyclic number.

It is not a de Polignac number, because 210023173 - 2⁹ = 210022661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210023173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210023113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105011586 + 105011587.

It is an arithmetic number, because the mean of its divisors is an integer number (105011587).

Almost surely, 2^210023173 is an apocalyptic number.

It is an amenable number.

210023173 is a deficient number, since it is larger than the sum of its proper divisors (1).

210023173 is an equidigital number, since it uses as much as digits as its factorization.

210023173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 210023173 is about 14492.1762685940. The cubic root of 210023173 is about 594.4140577267.

Adding to 210023173 its reverse (371320012), we get a palindrome (581343185).

The spelling of 210023173 in words is "two hundred ten million, twenty-three thousand, one hundred seventy-three".