8993643 has 8 divisors (see below), whose sum is σ = 12013056. Its totient is φ = 5985000.

The previous prime is 8993609. The next prime is 8993681. The reversal of 8993643 is 3463998.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8993643 - 2¹⁰ = 8992619 is a prime.

It is a super-2 number, since 2×8993643² = 161771228822898, which contains 22 as substring.

8993643 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 8993595 and 8993604.

It is not an unprimeable number, because it can be changed into a prime (8993603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 483 + ... + 4268.

It is an arithmetic number, because the mean of its divisors is an integer number (1501632).

Almost surely, 2^8993643 is an apocalyptic number.

8993643 is a deficient number, since it is larger than the sum of its proper divisors (3019413).

8993643 is a wasteful number, since it uses less digits than its factorization.

8993643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5385.

The product of its digits is 139968, while the sum is 42.

The square root of 8993643 is about 2998.9403128439. The cubic root of 8993643 is about 207.9593963519.

The spelling of 8993643 in words is "eight million, nine hundred ninety-three thousand, six hundred forty-three".