3973811 has 2 divisors, whose sum is σ = 3973812. Its totient is φ = 3973810.

The previous prime is 3973807. The next prime is 3973829. The reversal of 3973811 is 1183793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3973811 - 2² = 3973807 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3973861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1986905 + 1986906.

It is an arithmetic number, because the mean of its divisors is an integer number (1986906).

Almost surely, 2^3973811 is an apocalyptic number.

3973811 is a deficient number, since it is larger than the sum of its proper divisors (1).

3973811 is an equidigital number, since it uses as much as digits as its factorization.

3973811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 32.

The square root of 3973811 is about 1993.4419981529. The cubic root of 3973811 is about 158.3929093134.

The spelling of 3973811 in words is "three million, nine hundred seventy-three thousand, eight hundred eleven".