3968191 has 4 divisors (see below), whose sum is σ = 4201632. Its totient is φ = 3734752.

The previous prime is 3968183. The next prime is 3968201. The reversal of 3968191 is 1918693.

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 3968191 - 2³ = 3968183 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3968191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3968291) 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, 116695 + ... + 116728.

It is an arithmetic number, because the mean of its divisors is an integer number (1050408).

Almost surely, 2^3968191 is an apocalyptic number.

3968191 is a deficient number, since it is larger than the sum of its proper divisors (233441).

3968191 is a wasteful number, since it uses less digits than its factorization.

3968191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233440.

The product of its digits is 11664, while the sum is 37.

The square root of 3968191 is about 1992.0318772550. The cubic root of 3968191 is about 158.3182045256.

The spelling of 3968191 in words is "three million, nine hundred sixty-eight thousand, one hundred ninety-one".