8428169173 has 2 divisors, whose sum is σ = 8428169174. Its totient is φ = 8428169172.

The previous prime is 8428169161. The next prime is 8428169179. The reversal of 8428169173 is 3719618248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7251884964 + 1176284209 = 85158^2 + 34297^2 .

It is a cyclic number.

It is not a de Polignac number, because 8428169173 - 2¹³ = 8428160981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8428169179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4214084586 + 4214084587.

It is an arithmetic number, because the mean of its divisors is an integer number (4214084587).

Almost surely, 2^8428169173 is an apocalyptic number.

It is an amenable number.

8428169173 is a deficient number, since it is larger than the sum of its proper divisors (1).

8428169173 is an equidigital number, since it uses as much as digits as its factorization.

8428169173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 49.

The square root of 8428169173 is about 91805.0607156272. The cubic root of 8428169173 is about 2035.0624834572.

The spelling of 8428169173 in words is "eight billion, four hundred twenty-eight million, one hundred sixty-nine thousand, one hundred seventy-three".