2443066781 has 2 divisors, whose sum is σ = 2443066782. Its totient is φ = 2443066780.

The previous prime is 2443066777. The next prime is 2443066811. The reversal of 2443066781 is 1876603442.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1708168900 + 734897881 = 41330^2 + 27109^2 .

It is a cyclic number.

It is not a de Polignac number, because 2443066781 - 2² = 2443066777 is a prime.

It is a super-2 number, since 2×2443066781² = 11937150592851403922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2443066771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1221533390 + 1221533391.

It is an arithmetic number, because the mean of its divisors is an integer number (1221533391).

Almost surely, 2^2443066781 is an apocalyptic number.

It is an amenable number.

2443066781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2443066781 is an equidigital number, since it uses as much as digits as its factorization.

2443066781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 2443066781 is about 49427.3889761537. The cubic root of 2443066781 is about 1346.8268925606.

The spelling of 2443066781 in words is "two billion, four hundred forty-three million, sixty-six thousand, seven hundred eighty-one".