3953581 has 2 divisors, whose sum is σ = 3953582. Its totient is φ = 3953580.

The previous prime is 3953527. The next prime is 3953591. The reversal of 3953581 is 1853593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3258025 + 695556 = 1805^2 + 834^2 .

It is a cyclic number.

It is not a de Polignac number, because 3953581 - 2¹⁷ = 3822509 is a prime.

It is a super-2 number, since 2×3953581² = 31261605447122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3953591) 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, 1976790 + 1976791.

It is an arithmetic number, because the mean of its divisors is an integer number (1976791).

Almost surely, 2^3953581 is an apocalyptic number.

It is an amenable number.

3953581 is a deficient number, since it is larger than the sum of its proper divisors (1).

3953581 is an equidigital number, since it uses as much as digits as its factorization.

3953581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 34.

The square root of 3953581 is about 1988.3613856641. The cubic root of 3953581 is about 158.1236680667.

The spelling of 3953581 in words is "three million, nine hundred fifty-three thousand, five hundred eighty-one".