3956811 has 4 divisors (see below), whose sum is σ = 5275752. Its totient is φ = 2637872.

The previous prime is 3956803. The next prime is 3956831. The reversal of 3956811 is 1186593.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3956811 - 2³ = 3956803 is a prime.

It is a D-number.

3956811 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3956831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 659466 + ... + 659471.

It is an arithmetic number, because the mean of its divisors is an integer number (1318938).

Almost surely, 2^3956811 is an apocalyptic number.

3956811 is a deficient number, since it is larger than the sum of its proper divisors (1318941).

3956811 is a wasteful number, since it uses less digits than its factorization.

3956811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318940.

The product of its digits is 6480, while the sum is 33.

The square root of 3956811 is about 1989.1734464345. The cubic root of 3956811 is about 158.1667176820.

The spelling of 3956811 in words is "three million, nine hundred fifty-six thousand, eight hundred eleven".