8991293 has 2 divisors, whose sum is σ = 8991294. Its totient is φ = 8991292.

The previous prime is 8991289. The next prime is 8991299. The reversal of 8991293 is 3921998.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5098564 + 3892729 = 2258^2 + 1973^2 .

It is a cyclic number.

It is not a de Polignac number, because 8991293 - 2² = 8991289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8991293.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8991299) 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, 4495646 + 4495647.

It is an arithmetic number, because the mean of its divisors is an integer number (4495647).

Almost surely, 2^8991293 is an apocalyptic number.

It is an amenable number.

8991293 is a deficient number, since it is larger than the sum of its proper divisors (1).

8991293 is an equidigital number, since it uses as much as digits as its factorization.

8991293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 41.

The square root of 8991293 is about 2998.5484821827. The cubic root of 8991293 is about 207.9412818106.

The spelling of 8991293 in words is "eight million, nine hundred ninety-one thousand, two hundred ninety-three".