5909581 has 2 divisors, whose sum is σ = 5909582. Its totient is φ = 5909580.

The previous prime is 5909567. The next prime is 5909587. The reversal of 5909581 is 1859095.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5616900 + 292681 = 2370^2 + 541^2 .

It is a cyclic number.

It is not a de Polignac number, because 5909581 - 2⁵ = 5909549 is a prime.

It is a super-2 number, since 2×5909581² = 69846295191122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5909581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5909587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2954790 + 2954791.

It is an arithmetic number, because the mean of its divisors is an integer number (2954791).

Almost surely, 2^5909581 is an apocalyptic number.

It is an amenable number.

5909581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5909581 is an equidigital number, since it uses as much as digits as its factorization.

5909581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 37.

The square root of 5909581 is about 2430.9629779164. The cubic root of 5909581 is about 180.7946451575.

The spelling of 5909581 in words is "five million, nine hundred nine thousand, five hundred eighty-one".