3781065287 has 2 divisors, whose sum is σ = 3781065288. Its totient is φ = 3781065286.

The previous prime is 3781065241. The next prime is 3781065307. The reversal of 3781065287 is 7825601873.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3781065287 - 2¹⁰ = 3781064263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3781065787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1890532643 + 1890532644.

It is an arithmetic number, because the mean of its divisors is an integer number (1890532644).

Almost surely, 2^3781065287 is an apocalyptic number.

3781065287 is a deficient number, since it is larger than the sum of its proper divisors (1).

3781065287 is an equidigital number, since it uses as much as digits as its factorization.

3781065287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 47.

The square root of 3781065287 is about 61490.3674326313. The cubic root of 3781065287 is about 1557.8945526959.

The spelling of 3781065287 in words is "three billion, seven hundred eighty-one million, sixty-five thousand, two hundred eighty-seven".