868307173 has 2 divisors, whose sum is σ = 868307174. Its totient is φ = 868307172.

The previous prime is 868307171. The next prime is 868307207. The reversal of 868307173 is 371703868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 848964769 + 19342404 = 29137^2 + 4398^2 .

It is a cyclic number.

It is not a de Polignac number, because 868307173 - 2¹ = 868307171 is a prime.

Together with 868307171, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868307171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434153586 + 434153587.

It is an arithmetic number, because the mean of its divisors is an integer number (434153587).

Almost surely, 2^868307173 is an apocalyptic number.

It is an amenable number.

868307173 is a deficient number, since it is larger than the sum of its proper divisors (1).

868307173 is an equidigital number, since it uses as much as digits as its factorization.

868307173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 868307173 is about 29467.0523296783. The cubic root of 868307173 is about 954.0206961802.

The spelling of 868307173 in words is "eight hundred sixty-eight million, three hundred seven thousand, one hundred seventy-three".