2438493781 has 2 divisors, whose sum is σ = 2438493782. Its totient is φ = 2438493780.

The previous prime is 2438493773. The next prime is 2438493847. The reversal of 2438493781 is 1873948342.

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., 2343431281 + 95062500 = 48409^2 + 9750^2 .

It is a cyclic number.

It is not a de Polignac number, because 2438493781 - 2³ = 2438493773 is a prime.

It is a super-2 number, since 2×2438493781² = 11892503839951351922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2438494781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1219246890 + 1219246891.

It is an arithmetic number, because the mean of its divisors is an integer number (1219246891).

Almost surely, 2^2438493781 is an apocalyptic number.

It is an amenable number.

2438493781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2438493781 is an equidigital number, since it uses as much as digits as its factorization.

2438493781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 49.

The square root of 2438493781 is about 49381.1075311196. The cubic root of 2438493781 is about 1345.9860250745.

The spelling of 2438493781 in words is "two billion, four hundred thirty-eight million, four hundred ninety-three thousand, seven hundred eighty-one".