3918193 has 2 divisors, whose sum is σ = 3918194. Its totient is φ = 3918192.

The previous prime is 3918179. The next prime is 3918197.

3918193 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3640464 + 277729 = 1908^2 + 527^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 3918193 - 2⁹ = 3917681 is a prime.

It is not a weakly prime, because it can be changed into another prime (3918197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1959096 + 1959097.

It is an arithmetic number, because the mean of its divisors is an integer number (1959097).

Almost surely, 2^3918193 is an apocalyptic number.

It is an amenable number.

3918193 is a deficient number, since it is larger than the sum of its proper divisors (1).

3918193 is an equidigital number, since it uses as much as digits as its factorization.

3918193 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 3918193 is about 1979.4425983089. The cubic root of 3918193 is about 157.6504718013.

The spelling of 3918193 in words is "three million, nine hundred eighteen thousand, one hundred ninety-three".