8487213173 has 2 divisors, whose sum is σ = 8487213174. Its totient is φ = 8487213172.

The previous prime is 8487213079. The next prime is 8487213179. The reversal of 8487213173 is 3713127848.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4570706449 + 3916506724 = 67607^2 + 62582^2 .

It is a cyclic number.

It is not a de Polignac number, because 8487213173 - 2²⁰ = 8486164597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8487213179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4243606586 + 4243606587.

It is an arithmetic number, because the mean of its divisors is an integer number (4243606587).

Almost surely, 2^8487213173 is an apocalyptic number.

It is an amenable number.

8487213173 is a deficient number, since it is larger than the sum of its proper divisors (1).

8487213173 is an equidigital number, since it uses as much as digits as its factorization.

8487213173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 44.

The square root of 8487213173 is about 92126.0721674380. The cubic root of 8487213173 is about 2039.8036762403.

The spelling of 8487213173 in words is "eight billion, four hundred eighty-seven million, two hundred thirteen thousand, one hundred seventy-three".