3493827781 has 2 divisors, whose sum is σ = 3493827782. Its totient is φ = 3493827780.

The previous prime is 3493827773. The next prime is 3493827829. The reversal of 3493827781 is 1877283943.

3493827781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3316032225 + 177795556 = 57585^2 + 13334^2 .

It is a cyclic number.

It is not a de Polignac number, because 3493827781 - 2³ = 3493827773 is a prime.

It is a super-2 number, since 2×3493827781² = 24413665126574767922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3493827731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1746913890 + 1746913891.

It is an arithmetic number, because the mean of its divisors is an integer number (1746913891).

Almost surely, 2^3493827781 is an apocalyptic number.

It is an amenable number.

3493827781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3493827781 is an equidigital number, since it uses as much as digits as its factorization.

3493827781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 52.

The square root of 3493827781 is about 59108.6100411776. The cubic root of 3493827781 is about 1517.4014611588.

The spelling of 3493827781 in words is "three billion, four hundred ninety-three million, eight hundred twenty-seven thousand, seven hundred eighty-one".