8949643 has 4 divisors (see below), whose sum is σ = 8955808. Its totient is φ = 8943480.

The previous prime is 8949637. The next prime is 8949649. The reversal of 8949643 is 3469498.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (8949637) and next prime (8949649).

It is a cyclic number.

It is not a de Polignac number, because 8949643 - 2⁹ = 8949131 is a prime.

It is a super-3 number, since 3×8949643³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

8949643 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8949643.

It is not an unprimeable number, because it can be changed into a prime (8949649) 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 3 ways as a sum of consecutive naturals, for example, 430 + ... + 4252.

It is an arithmetic number, because the mean of its divisors is an integer number (2238952).

Almost surely, 2^8949643 is an apocalyptic number.

8949643 is a deficient number, since it is larger than the sum of its proper divisors (6165).

8949643 is a wasteful number, since it uses less digits than its factorization.

8949643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6164.

The product of its digits is 186624, while the sum is 43.

The square root of 8949643 is about 2991.5953937657. The cubic root of 8949643 is about 207.6197054492.

The spelling of 8949643 in words is "eight million, nine hundred forty-nine thousand, six hundred forty-three".