3694181 has 2 divisors, whose sum is σ = 3694182. Its totient is φ = 3694180.

The previous prime is 3694147. The next prime is 3694183. The reversal of 3694181 is 1814963.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3363556 + 330625 = 1834^2 + 575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3694181 is a prime.

It is a super-2 number, since 2×3694181² = 27293946521522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 3694183, it forms a pair of twin primes.

It is a Chen prime.

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

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3694183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1847090 + 1847091.

It is an arithmetic number, because the mean of its divisors is an integer number (1847091).

Almost surely, 2^3694181 is an apocalyptic number.

It is an amenable number.

3694181 is a deficient number, since it is larger than the sum of its proper divisors (1).

3694181 is an equidigital number, since it uses as much as digits as its factorization.

3694181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

The square root of 3694181 is about 1922.0252339655. The cubic root of 3694181 is about 154.5869125538.

The spelling of 3694181 in words is "three million, six hundred ninety-four thousand, one hundred eighty-one".