8991347 has 2 divisors, whose sum is σ = 8991348. Its totient is φ = 8991346.

The previous prime is 8991319. The next prime is 8991361. The reversal of 8991347 is 7431998.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8991347 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8991377) 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, 4495673 + 4495674.

It is an arithmetic number, because the mean of its divisors is an integer number (4495674).

Almost surely, 2^8991347 is an apocalyptic number.

8991347 is a deficient number, since it is larger than the sum of its proper divisors (1).

8991347 is an equidigital number, since it uses as much as digits as its factorization.

8991347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The square root of 8991347 is about 2998.5574865258. The cubic root of 8991347 is about 207.9416980950.

The spelling of 8991347 in words is "eight million, nine hundred ninety-one thousand, three hundred forty-seven".