7881193 has 2 divisors, whose sum is σ = 7881194. Its totient is φ = 7881192.

The previous prime is 7881187. The next prime is 7881221. The reversal of 7881193 is 3911887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5438224 + 2442969 = 2332^2 + 1563^2 .

It is a cyclic number.

It is not a de Polignac number, because 7881193 - 2¹³ = 7873001 is a prime.

It is a super-2 number, since 2×7881193² = 124226406206498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7881113) 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, 3940596 + 3940597.

It is an arithmetic number, because the mean of its divisors is an integer number (3940597).

Almost surely, 2^7881193 is an apocalyptic number.

It is an amenable number.

7881193 is a deficient number, since it is larger than the sum of its proper divisors (1).

7881193 is an equidigital number, since it uses as much as digits as its factorization.

7881193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 37.

The square root of 7881193 is about 2807.3462558081. The cubic root of 7881193 is about 199.0049997481.

The spelling of 7881193 in words is "seven million, eight hundred eighty-one thousand, one hundred ninety-three".