3983961 has 4 divisors (see below), whose sum is σ = 5311952. Its totient is φ = 2655972.

The previous prime is 3983951. The next prime is 3983963. The reversal of 3983961 is 1693893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3983961 - 2⁶ = 3983897 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

3983961 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3983963) 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, 663991 + ... + 663996.

It is an arithmetic number, because the mean of its divisors is an integer number (1327988).

Almost surely, 2^3983961 is an apocalyptic number.

It is an amenable number.

3983961 is a deficient number, since it is larger than the sum of its proper divisors (1327991).

3983961 is a wasteful number, since it uses less digits than its factorization.

3983961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327990.

The product of its digits is 34992, while the sum is 39.

The square root of 3983961 is about 1995.9862223973. The cubic root of 3983961 is about 158.5276516024.

The spelling of 3983961 in words is "three million, nine hundred eighty-three thousand, nine hundred sixty-one".