210930173 has 2 divisors, whose sum is σ = 210930174. Its totient is φ = 210930172.

The previous prime is 210930119. The next prime is 210930197. The reversal of 210930173 is 371039012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208455844 + 2474329 = 14438^2 + 1573^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210930173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210930113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105465086 + 105465087.

It is an arithmetic number, because the mean of its divisors is an integer number (105465087).

Almost surely, 2^210930173 is an apocalyptic number.

It is an amenable number.

210930173 is a deficient number, since it is larger than the sum of its proper divisors (1).

210930173 is an equidigital number, since it uses as much as digits as its factorization.

210930173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 210930173 is about 14523.4353029853. The cubic root of 210930173 is about 595.2685020305.

Adding to 210930173 its reverse (371039012), we get a palindrome (581969185).

The spelling of 210930173 in words is "two hundred ten million, nine hundred thirty thousand, one hundred seventy-three".