3967871 has 2 divisors, whose sum is σ = 3967872. Its totient is φ = 3967870.

The previous prime is 3967841. The next prime is 3967877. The reversal of 3967871 is 1787693.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3967871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3967877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1983935 + 1983936.

It is an arithmetic number, because the mean of its divisors is an integer number (1983936).

Almost surely, 2^3967871 is an apocalyptic number.

3967871 is a deficient number, since it is larger than the sum of its proper divisors (1).

3967871 is an equidigital number, since it uses as much as digits as its factorization.

3967871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 41.

The square root of 3967871 is about 1991.9515556358. The cubic root of 3967871 is about 158.3139487503.

The spelling of 3967871 in words is "three million, nine hundred sixty-seven thousand, eight hundred seventy-one".