3781378241 has 2 divisors, whose sum is σ = 3781378242. Its totient is φ = 3781378240.

The previous prime is 3781378201. The next prime is 3781378243. The reversal of 3781378241 is 1428731873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3752175025 + 29203216 = 61255^2 + 5404^2 .

It is an emirp because it is prime and its reverse (1428731873) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3781378241 - 2⁶ = 3781378177 is a prime.

Together with 3781378243, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3781378192 and 3781378201.

It is not a weakly prime, because it can be changed into another prime (3781378243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1890689120 + 1890689121.

It is an arithmetic number, because the mean of its divisors is an integer number (1890689121).

Almost surely, 2^3781378241 is an apocalyptic number.

It is an amenable number.

3781378241 is a deficient number, since it is larger than the sum of its proper divisors (1).

3781378241 is an equidigital number, since it uses as much as digits as its factorization.

3781378241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 44.

The square root of 3781378241 is about 61492.9121200159. The cubic root of 3781378241 is about 1557.9375331652.

The spelling of 3781378241 in words is "three billion, seven hundred eighty-one million, three hundred seventy-eight thousand, two hundred forty-one".