3658181 has 2 divisors, whose sum is σ = 3658182. Its totient is φ = 3658180.

The previous prime is 3658159. The next prime is 3658189. The reversal of 3658181 is 1818563.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3441025 + 217156 = 1855^2 + 466^2 .

It is a cyclic number.

It is not a de Polignac number, because 3658181 - 2⁶ = 3658117 is a prime.

It is a super-2 number, since 2×3658181² = 26764576457522, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3658189) 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, 1829090 + 1829091.

It is an arithmetic number, because the mean of its divisors is an integer number (1829091).

Almost surely, 2^3658181 is an apocalyptic number.

It is an amenable number.

3658181 is a deficient number, since it is larger than the sum of its proper divisors (1).

3658181 is an equidigital number, since it uses as much as digits as its factorization.

3658181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 32.

The square root of 3658181 is about 1912.6371846223. The cubic root of 3658181 is about 154.0831197998.

The spelling of 3658181 in words is "three million, six hundred fifty-eight thousand, one hundred eighty-one".