3975813 has 12 divisors (see below), whose sum is σ = 5941260. Its totient is φ = 2558976.

The previous prime is 3975791. The next prime is 3975827. The reversal of 3975813 is 3185793.

3975813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1292769 + 2683044 = 1137^2 + 1638^2 .

It is not a de Polignac number, because 3975813 - 2⁶ = 3975749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3975863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7356 + ... + 7877.

It is an arithmetic number, because the mean of its divisors is an integer number (495105).

Almost surely, 2^3975813 is an apocalyptic number.

It is an amenable number.

3975813 is a deficient number, since it is larger than the sum of its proper divisors (1965447).

3975813 is a wasteful number, since it uses less digits than its factorization.

3975813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15268 (or 15265 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 3975813 is about 1993.9440814627. The cubic root of 3975813 is about 158.4195042175.

The spelling of 3975813 in words is "three million, nine hundred seventy-five thousand, eight hundred thirteen".