5493781 has 2 divisors, whose sum is σ = 5493782. Its totient is φ = 5493780.

The previous prime is 5493773. The next prime is 5493791. The reversal of 5493781 is 1873945.

5493781 is nontrivially palindromic in base 3.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5447556 + 46225 = 2334^2 + 215^2 .

It is a cyclic number.

It is not a de Polignac number, because 5493781 - 2³ = 5493773 is a prime.

It is a super-2 number, since 2×5493781² = 60363259351922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5493781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5493751) 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, 2746890 + 2746891.

It is an arithmetic number, because the mean of its divisors is an integer number (2746891).

Almost surely, 2^5493781 is an apocalyptic number.

It is an amenable number.

5493781 is a deficient number, since it is larger than the sum of its proper divisors (1).

5493781 is an equidigital number, since it uses as much as digits as its factorization.

5493781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 5493781 is about 2343.8816096382. The cubic root of 5493781 is about 176.4508606553.

The spelling of 5493781 in words is "five million, four hundred ninety-three thousand, seven hundred eighty-one".