5677981 has 2 divisors, whose sum is σ = 5677982. Its totient is φ = 5677980.

The previous prime is 5677963. The next prime is 5677993. The reversal of 5677981 is 1897765.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4884100 + 793881 = 2210^2 + 891^2 .

It is a cyclic number.

It is not a de Polignac number, because 5677981 - 2⁷ = 5677853 is a prime.

It is a super-2 number, since 2×5677981² = 64478936472722, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5677081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2838990 + 2838991.

It is an arithmetic number, because the mean of its divisors is an integer number (2838991).

Almost surely, 2^5677981 is an apocalyptic number.

It is an amenable number.

5677981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5677981 is an equidigital number, since it uses as much as digits as its factorization.

5677981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 43.

The square root of 5677981 is about 2382.8514431244. The cubic root of 5677981 is about 178.4012850390.

The spelling of 5677981 in words is "five million, six hundred seventy-seven thousand, nine hundred eighty-one".