8809993 has 2 divisors, whose sum is σ = 8809994. Its totient is φ = 8809992.

The previous prime is 8809991. The next prime is 8810003. The reversal of 8809993 is 3999088.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7033104 + 1776889 = 2652^2 + 1333^2 .

It is a cyclic number.

It is not a de Polignac number, because 8809993 - 2¹ = 8809991 is a prime.

Together with 8809991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (8809991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4404996 + 4404997.

It is an arithmetic number, because the mean of its divisors is an integer number (4404997).

Almost surely, 2^8809993 is an apocalyptic number.

It is an amenable number.

8809993 is a deficient number, since it is larger than the sum of its proper divisors (1).

8809993 is an equidigital number, since it uses as much as digits as its factorization.

8809993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 8809993 is about 2968.1632367510. The cubic root of 8809993 is about 206.5341418259.

The spelling of 8809993 in words is "eight million, eight hundred nine thousand, nine hundred ninety-three".