8908993 has 4 divisors (see below), whose sum is σ = 9031108. Its totient is φ = 8786880.

The previous prime is 8908987. The next prime is 8909023. The reversal of 8908993 is 3998098.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3470769 + 5438224 = 1863^2 + 2332^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8908993 is a prime.

It is a Duffinian number.

8908993 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8908903) 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, 60948 + ... + 61093.

It is an arithmetic number, because the mean of its divisors is an integer number (2257777).

Almost surely, 2^8908993 is an apocalyptic number.

It is an amenable number.

8908993 is a deficient number, since it is larger than the sum of its proper divisors (122115).

8908993 is a wasteful number, since it uses less digits than its factorization.

8908993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122114.

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

The square root of 8908993 is about 2984.7936277069. The cubic root of 8908993 is about 207.3048865094.

The spelling of 8908993 in words is "eight million, nine hundred eight thousand, nine hundred ninety-three".