8991383 has 2 divisors, whose sum is σ = 8991384. Its totient is φ = 8991382.

The previous prime is 8991379. The next prime is 8991401. The reversal of 8991383 is 3831998.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8991383 - 2² = 8991379 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 8991383.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8994383) 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 as a sum of consecutive naturals, namely, 4495691 + 4495692.

It is an arithmetic number, because the mean of its divisors is an integer number (4495692).

Almost surely, 2^8991383 is an apocalyptic number.

8991383 is a deficient number, since it is larger than the sum of its proper divisors (1).

8991383 is an equidigital number, since it uses as much as digits as its factorization.

8991383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 41.

The square root of 8991383 is about 2998.5634894062. The cubic root of 8991383 is about 207.9419756171.

The spelling of 8991383 in words is "eight million, nine hundred ninety-one thousand, three hundred eighty-three".