5911681 has 2 divisors, whose sum is σ = 5911682. Its totient is φ = 5911680.

The previous prime is 5911663. The next prime is 5911709. The reversal of 5911681 is 1861195.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5130225 + 781456 = 2265^2 + 884^2 .

It is a cyclic number.

It is not a de Polignac number, because 5911681 - 2⁷ = 5911553 is a prime.

It is a super-2 number, since 2×5911681² = 69895944491522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5911651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2955840 + 2955841.

It is an arithmetic number, because the mean of its divisors is an integer number (2955841).

Almost surely, 2^5911681 is an apocalyptic number.

It is an amenable number.

5911681 is a deficient number, since it is larger than the sum of its proper divisors (1).

5911681 is an equidigital number, since it uses as much as digits as its factorization.

5911681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 31.

The square root of 5911681 is about 2431.3948671493. The cubic root of 5911681 is about 180.8160580570.

The spelling of 5911681 in words is "five million, nine hundred eleven thousand, six hundred eighty-one".