8169998 has 4 divisors (see below), whose sum is σ = 12255000. Its totient is φ = 4084998.

The previous prime is 8169989. The next prime is 8170009. The reversal of 8169998 is 8999618.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8999618 = 2 ⋅4499809.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2042498 + ... + 2042501.

It is an arithmetic number, because the mean of its divisors is an integer number (3063750).

Almost surely, 2^8169998 is an apocalyptic number.

8169998 is a deficient number, since it is larger than the sum of its proper divisors (4085002).

8169998 is a wasteful number, since it uses less digits than its factorization.

8169998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4085001.

The product of its digits is 279936, while the sum is 50.

The square root of 8169998 is about 2858.3208357356. The cubic root of 8169998 is about 201.4067323227.

The spelling of 8169998 in words is "eight million, one hundred sixty-nine thousand, nine hundred ninety-eight".