5681911 has 2 divisors, whose sum is σ = 5681912. Its totient is φ = 5681910.

The previous prime is 5681899. The next prime is 5681933. The reversal of 5681911 is 1191865.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5681911 - 2¹³ = 5673719 is a prime.

It is a super-2 number, since 2×5681911² = 64568225223842, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5681981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2840955 + 2840956.

It is an arithmetic number, because the mean of its divisors is an integer number (2840956).

Almost surely, 2^5681911 is an apocalyptic number.

5681911 is a deficient number, since it is larger than the sum of its proper divisors (1).

5681911 is an equidigital number, since it uses as much as digits as its factorization.

5681911 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 5681911 is about 2383.6759427405. The cubic root of 5681911 is about 178.4424355439.

The spelling of 5681911 in words is "five million, six hundred eighty-one thousand, nine hundred eleven".