870173 has 2 divisors, whose sum is σ = 870174. Its totient is φ = 870172.

The previous prime is 870169. The next prime is 870197. The reversal of 870173 is 371078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 822649 + 47524 = 907^2 + 218^2 .

It is a cyclic number.

It is not a de Polignac number, because 870173 - 2² = 870169 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870773) 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, 435086 + 435087.

It is an arithmetic number, because the mean of its divisors is an integer number (435087).

2⁸⁷⁰¹⁷³ is an apocalyptic number.

It is an amenable number.

870173 is a deficient number, since it is larger than the sum of its proper divisors (1).

870173 is an equidigital number, since it uses as much as digits as its factorization.

870173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 870173 is about 932.8306384334. The cubic root of 870173 is about 95.4703543664.

The spelling of 870173 in words is "eight hundred seventy thousand, one hundred seventy-three".