8428169 has 2 divisors, whose sum is σ = 8428170. Its totient is φ = 8428168.

The previous prime is 8428163. The next prime is 8428171. The reversal of 8428169 is 9618248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7075600 + 1352569 = 2660^2 + 1163^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8428169 is a prime.

It is a super-2 number, since 2×8428169² = 142068065385122, which contains 22 as substring.

Together with 8428171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8428163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4214084 + 4214085.

It is an arithmetic number, because the mean of its divisors is an integer number (4214085).

Almost surely, 2^8428169 is an apocalyptic number.

It is an amenable number.

8428169 is a deficient number, since it is larger than the sum of its proper divisors (1).

8428169 is an equidigital number, since it uses as much as digits as its factorization.

8428169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 38.

The square root of 8428169 is about 2903.1308961189. The cubic root of 8428169 is about 203.5062469533.

The spelling of 8428169 in words is "eight million, four hundred twenty-eight thousand, one hundred sixty-nine".