3977867 has 2 divisors, whose sum is σ = 3977868. Its totient is φ = 3977866.

The previous prime is 3977863. The next prime is 3977891. The reversal of 3977867 is 7687793.

It is a weak prime.

It is an emirp because it is prime and its reverse (7687793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3977867 - 2² = 3977863 is a prime.

It is not a weakly prime, because it can be changed into another prime (3977863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1988933 + 1988934.

It is an arithmetic number, because the mean of its divisors is an integer number (1988934).

Almost surely, 2^3977867 is an apocalyptic number.

3977867 is a deficient number, since it is larger than the sum of its proper divisors (1).

3977867 is an equidigital number, since it uses as much as digits as its factorization.

3977867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 444528, while the sum is 47.

The square root of 3977867 is about 1994.4590745363. The cubic root of 3977867 is about 158.4467806213.

It can be divided in two parts, 397786 and 7, that added together give a palindrome (397793).

The spelling of 3977867 in words is "three million, nine hundred seventy-seven thousand, eight hundred sixty-seven".