8938991 has 8 divisors (see below), whose sum is σ = 9517824. Its totient is φ = 8366080.

The previous prime is 8938961. The next prime is 8938997. The reversal of 8938991 is 1998398.

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

It is a cyclic number.

It is not a de Polignac number, because 8938991 - 2¹⁴ = 8922607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8938997) 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, 1871 + ... + 4623.

It is an arithmetic number, because the mean of its divisors is an integer number (1189728).

Almost surely, 2^8938991 is an apocalyptic number.

8938991 is a deficient number, since it is larger than the sum of its proper divisors (578833).

8938991 is a wasteful number, since it uses less digits than its factorization.

8938991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2961.

The product of its digits is 139968, while the sum is 47.

The square root of 8938991 is about 2989.8145427434. The cubic root of 8938991 is about 207.5373020469.

The spelling of 8938991 in words is "eight million, nine hundred thirty-eight thousand, nine hundred ninety-one".