5657881 has 2 divisors, whose sum is σ = 5657882. Its totient is φ = 5657880.

The previous prime is 5657867. The next prime is 5657887. The reversal of 5657881 is 1887565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4447881 + 1210000 = 2109^2 + 1100^2 .

It is a cyclic number.

It is not a de Polignac number, because 5657881 - 2¹⁹ = 5133593 is a prime.

It is a super-2 number, since 2×5657881² = 64023234820322, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (5657887) 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, 2828940 + 2828941.

It is an arithmetic number, because the mean of its divisors is an integer number (2828941).

Almost surely, 2^5657881 is an apocalyptic number.

It is an amenable number.

5657881 is a deficient number, since it is larger than the sum of its proper divisors (1).

5657881 is an equidigital number, since it uses as much as digits as its factorization.

5657881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67200, while the sum is 40.

The square root of 5657881 is about 2378.6300679172. The cubic root of 5657881 is about 178.1905231807.

The spelling of 5657881 in words is "five million, six hundred fifty-seven thousand, eight hundred eighty-one".