3444378781 has 2 divisors, whose sum is σ = 3444378782. Its totient is φ = 3444378780.

The previous prime is 3444378761. The next prime is 3444378797. The reversal of 3444378781 is 1878734443.

It is a happy number.

3444378781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3372705625 + 71673156 = 58075^2 + 8466^2 .

It is an emirp because it is prime and its reverse (1878734443) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3444378781 - 2¹⁹ = 3443854493 is a prime.

It is a super-2 number, since 2×3444378781² = 23727490374006091922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3444378701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1722189390 + 1722189391.

It is an arithmetic number, because the mean of its divisors is an integer number (1722189391).

Almost surely, 2^3444378781 is an apocalyptic number.

It is an amenable number.

3444378781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3444378781 is an equidigital number, since it uses as much as digits as its factorization.

3444378781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1806336, while the sum is 49.

The square root of 3444378781 is about 58688.8301212420. The cubic root of 3444378781 is about 1510.2087019107.

The spelling of 3444378781 in words is "three billion, four hundred forty-four million, three hundred seventy-eight thousand, seven hundred eighty-one".