3973845 has 32 divisors (see below), whose sum is σ = 6678144. Its totient is φ = 2016000.

The previous prime is 3973829. The next prime is 3973847. The reversal of 3973845 is 5483793.

It is not a de Polignac number, because 3973845 - 2⁴ = 3973829 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3973847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39295 + ... + 39395.

It is an arithmetic number, because the mean of its divisors is an integer number (208692).

Almost surely, 2^3973845 is an apocalyptic number.

It is an amenable number.

3973845 is a deficient number, since it is larger than the sum of its proper divisors (2704299).

3973845 is a wasteful number, since it uses less digits than its factorization.

3973845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213.

The product of its digits is 90720, while the sum is 39.

The square root of 3973845 is about 1993.4505260979. The cubic root of 3973845 is about 158.3933610497.

The spelling of 3973845 in words is "three million, nine hundred seventy-three thousand, eight hundred forty-five".