212685173 has 2 divisors, whose sum is σ = 212685174. Its totient is φ = 212685172.

The previous prime is 212685167. The next prime is 212685197. The reversal of 212685173 is 371586212.

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., 180445489 + 32239684 = 13433^2 + 5678^2 .

It is a cyclic number.

It is not a de Polignac number, because 212685173 - 2⁴ = 212685157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212685103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106342586 + 106342587.

It is an arithmetic number, because the mean of its divisors is an integer number (106342587).

Almost surely, 2^212685173 is an apocalyptic number.

It is an amenable number.

212685173 is a deficient number, since it is larger than the sum of its proper divisors (1).

212685173 is an equidigital number, since it uses as much as digits as its factorization.

212685173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 35.

The square root of 212685173 is about 14583.7297355649. The cubic root of 212685173 is about 596.9148796504.

The spelling of 212685173 in words is "two hundred twelve million, six hundred eighty-five thousand, one hundred seventy-three".