3973961 has 4 divisors (see below), whose sum is σ = 3978000. Its totient is φ = 3969924.

The previous prime is 3973943. The next prime is 3973973. The reversal of 3973961 is 1693793.

3973961 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3973961 - 2¹⁰ = 3972937 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3973061) 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, 530 + ... + 2868.

It is an arithmetic number, because the mean of its divisors is an integer number (994500).

Almost surely, 2^3973961 is an apocalyptic number.

It is an amenable number.

3973961 is a deficient number, since it is larger than the sum of its proper divisors (4039).

3973961 is a wasteful number, since it uses less digits than its factorization.

3973961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4038.

The product of its digits is 30618, while the sum is 38.

The square root of 3973961 is about 1993.4796211650. The cubic root of 3973961 is about 158.3949022481.

The spelling of 3973961 in words is "three million, nine hundred seventy-three thousand, nine hundred sixty-one".