8749813 has 2 divisors, whose sum is σ = 8749814. Its totient is φ = 8749812.

The previous prime is 8749789. The next prime is 8749817. The reversal of 8749813 is 3189478.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8749764 + 49 = 2958^2 + 7^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8749813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8749817) 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, 4374906 + 4374907.

It is an arithmetic number, because the mean of its divisors is an integer number (4374907).

Almost surely, 2^8749813 is an apocalyptic number.

It is an amenable number.

8749813 is a deficient number, since it is larger than the sum of its proper divisors (1).

8749813 is an equidigital number, since it uses as much as digits as its factorization.

8749813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 8749813 is about 2958.0082826118. The cubic root of 8749813 is about 206.0627970174.

The spelling of 8749813 in words is "eight million, seven hundred forty-nine thousand, eight hundred thirteen".