3930581 has 2 divisors, whose sum is σ = 3930582. Its totient is φ = 3930580.

The previous prime is 3930571. The next prime is 3930593. The reversal of 3930581 is 1850393.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3276100 + 654481 = 1810^2 + 809^2 .

It is a cyclic number.

It is not a de Polignac number, because 3930581 - 2⁶ = 3930517 is a prime.

It is a super-2 number, since 2×3930581² = 30898933995122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3930541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1965290 + 1965291.

It is an arithmetic number, because the mean of its divisors is an integer number (1965291).

Almost surely, 2^3930581 is an apocalyptic number.

It is an amenable number.

3930581 is a deficient number, since it is larger than the sum of its proper divisors (1).

3930581 is an equidigital number, since it uses as much as digits as its factorization.

3930581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 3930581 is about 1982.5692926100. The cubic root of 3930581 is about 157.8164428189.

The spelling of 3930581 in words is "three million, nine hundred thirty thousand, five hundred eighty-one".