8169993 has 12 divisors (see below), whose sum is σ = 12709060. Its totient is φ = 5027616.

The previous prime is 8169989. The next prime is 8170009. The reversal of 8169993 is 3999618.

It can be written as a sum of positive squares in 2 ways, for example, as 535824 + 7634169 = 732^2 + 2763^2 .

It is not a de Polignac number, because 8169993 - 2² = 8169989 is a prime.

It is a super-3 number, since 3×8169993³ (a number of 22 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8169923) 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 in 11 ways as a sum of consecutive naturals, for example, 34798 + ... + 35031.

Almost surely, 2^8169993 is an apocalyptic number.

It is an amenable number.

8169993 is a deficient number, since it is larger than the sum of its proper divisors (4539067).

8169993 is a wasteful number, since it uses less digits than its factorization.

8169993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69848 (or 69845 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 8169993 is about 2858.3199610960. The cubic root of 8169993 is about 201.4066912361.

The spelling of 8169993 in words is "eight million, one hundred sixty-nine thousand, nine hundred ninety-three".