5659781 has 2 divisors, whose sum is σ = 5659782. Its totient is φ = 5659780.

The previous prime is 5659751. The next prime is 5659783. The reversal of 5659781 is 1879565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3724900 + 1934881 = 1930^2 + 1391^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5659781 is a prime.

It is a super-2 number, since 2×5659781² = 64066241935922, which contains 22 as substring.

Together with 5659783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5659783) 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, 2829890 + 2829891.

It is an arithmetic number, because the mean of its divisors is an integer number (2829891).

Almost surely, 2^5659781 is an apocalyptic number.

It is an amenable number.

5659781 is a deficient number, since it is larger than the sum of its proper divisors (1).

5659781 is an equidigital number, since it uses as much as digits as its factorization.

5659781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 41.

The square root of 5659781 is about 2379.0294239458. The cubic root of 5659781 is about 178.2104672848.

The spelling of 5659781 in words is "five million, six hundred fifty-nine thousand, seven hundred eighty-one".