5674591981 has 2 divisors, whose sum is σ = 5674591982. Its totient is φ = 5674591980.

The previous prime is 5674591963. The next prime is 5674592059. The reversal of 5674591981 is 1891954765.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2927783881 + 2746808100 = 54109^2 + 52410^2 .

It is a cyclic number.

It is not a de Polignac number, because 5674591981 - 2¹¹ = 5674589933 is a prime.

It is a super-2 number, since 2×5674591981² = 64401988301659008722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5674591931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2837295990 + 2837295991.

It is an arithmetic number, because the mean of its divisors is an integer number (2837295991).

Almost surely, 2^5674591981 is an apocalyptic number.

It is an amenable number.

5674591981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5674591981 is an equidigital number, since it uses as much as digits as its factorization.

5674591981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2721600, while the sum is 55.

The square root of 5674591981 is about 75329.8877006995. The cubic root of 5674591981 is about 1783.6578382391.

The spelling of 5674591981 in words is "five billion, six hundred seventy-four million, five hundred ninety-one thousand, nine hundred eighty-one".