3885087781 has 2 divisors, whose sum is σ = 3885087782. Its totient is φ = 3885087780.

The previous prime is 3885087751. The next prime is 3885087793. The reversal of 3885087781 is 1877805883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3571974756 + 313113025 = 59766^2 + 17695^2 .

It is a cyclic number.

It is not a de Polignac number, because 3885087781 - 2⁵ = 3885087749 is a prime.

It is a super-2 number, since 2×3885087781² = 30187814132151007922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3885087721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1942543890 + 1942543891.

It is an arithmetic number, because the mean of its divisors is an integer number (1942543891).

Almost surely, 2^3885087781 is an apocalyptic number.

It is an amenable number.

3885087781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3885087781 is an equidigital number, since it uses as much as digits as its factorization.

3885087781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3010560, while the sum is 55.

The square root of 3885087781 is about 62330.4723309554. The cubic root of 3885087781 is about 1572.0521369757.

The spelling of 3885087781 in words is "three billion, eight hundred eighty-five million, eighty-seven thousand, seven hundred eighty-one".