3877681 has 2 divisors, whose sum is σ = 3877682. Its totient is φ = 3877680.

The previous prime is 3877673. The next prime is 3877703. The reversal of 3877681 is 1867783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3837681 + 40000 = 1959^2 + 200^2 .

It is an emirp because it is prime and its reverse (1867783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3877681 - 2³ = 3877673 is a prime.

It is a super-2 number, since 2×3877681² = 30072819875522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3877631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1938840 + 1938841.

It is an arithmetic number, because the mean of its divisors is an integer number (1938841).

Almost surely, 2^3877681 is an apocalyptic number.

It is an amenable number.

3877681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3877681 is an equidigital number, since it uses as much as digits as its factorization.

3877681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 40.

The square root of 3877681 is about 1969.1828254380. The cubic root of 3877681 is about 157.1052481032.

The spelling of 3877681 in words is "three million, eight hundred seventy-seven thousand, six hundred eighty-one".