5661893 has 2 divisors, whose sum is σ = 5661894. Its totient is φ = 5661892.

The previous prime is 5661839. The next prime is 5661899. The reversal of 5661893 is 3981665.

Together with previous prime (5661839) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3751969 + 1909924 = 1937^2 + 1382^2 .

It is a cyclic number.

It is not a de Polignac number, because 5661893 - 2⁸ = 5661637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5661899) 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, 2830946 + 2830947.

It is an arithmetic number, because the mean of its divisors is an integer number (2830947).

Almost surely, 2^5661893 is an apocalyptic number.

It is an amenable number.

5661893 is a deficient number, since it is larger than the sum of its proper divisors (1).

5661893 is an equidigital number, since it uses as much as digits as its factorization.

5661893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 38.

The square root of 5661893 is about 2379.4732610391. The cubic root of 5661893 is about 178.2326314934.

The spelling of 5661893 in words is "five million, six hundred sixty-one thousand, eight hundred ninety-three".