3981923 has 4 divisors (see below), whose sum is σ = 4343928. Its totient is φ = 3619920.

The previous prime is 3981917. The next prime is 3981937. The reversal of 3981923 is 3291893.

3981923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3981923 - 2¹⁶ = 3916387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3981953) 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 3 ways as a sum of consecutive naturals, for example, 180986 + ... + 181007.

It is an arithmetic number, because the mean of its divisors is an integer number (1085982).

Almost surely, 2^3981923 is an apocalyptic number.

3981923 is a deficient number, since it is larger than the sum of its proper divisors (362005).

3981923 is a wasteful number, since it uses less digits than its factorization.

3981923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362004.

The product of its digits is 11664, while the sum is 35.

The square root of 3981923 is about 1995.4756325247. The cubic root of 3981923 is about 158.5006153220.

The spelling of 3981923 in words is "three million, nine hundred eighty-one thousand, nine hundred twenty-three".