8113993 has 2 divisors, whose sum is σ = 8113994. Its totient is φ = 8113992.

The previous prime is 8113979. The next prime is 8113999. The reversal of 8113993 is 3993118.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4609609 + 3504384 = 2147^2 + 1872^2 .

It is a cyclic number.

It is not a de Polignac number, because 8113993 - 2⁵ = 8113961 is a prime.

It is not a weakly prime, because it can be changed into another prime (8113999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4056996 + 4056997.

It is an arithmetic number, because the mean of its divisors is an integer number (4056997).

Almost surely, 2^8113993 is an apocalyptic number.

It is an amenable number.

8113993 is a deficient number, since it is larger than the sum of its proper divisors (1).

8113993 is an equidigital number, since it uses as much as digits as its factorization.

8113993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 34.

The square root of 8113993 is about 2848.5071528785. The cubic root of 8113993 is about 200.9454651024.

It can be divided in two parts, 811 and 3993, that multiplied together give a palindrome (3238323).

The spelling of 8113993 in words is "eight million, one hundred thirteen thousand, nine hundred ninety-three".