3768581 has 2 divisors, whose sum is σ = 3768582. Its totient is φ = 3768580.

The previous prime is 3768559. The next prime is 3768587. The reversal of 3768581 is 1858673.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3724900 + 43681 = 1930^2 + 209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3768581 is a prime.

It is a super-2 number, since 2×3768581² = 28404405507122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3768587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1884290 + 1884291.

It is an arithmetic number, because the mean of its divisors is an integer number (1884291).

Almost surely, 2^3768581 is an apocalyptic number.

It is an amenable number.

3768581 is a deficient number, since it is larger than the sum of its proper divisors (1).

3768581 is an equidigital number, since it uses as much as digits as its factorization.

3768581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 38.

The square root of 3768581 is about 1941.2833384130. The cubic root of 3768581 is about 155.6178048103.

The spelling of 3768581 in words is "three million, seven hundred sixty-eight thousand, five hundred eighty-one".