3963491 has 4 divisors (see below), whose sum is σ = 4529712. Its totient is φ = 3397272.

The previous prime is 3963473. The next prime is 3963493. The reversal of 3963491 is 1943693.

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 3963491 - 2¹⁰ = 3962467 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3963493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283100 + ... + 283113.

It is an arithmetic number, because the mean of its divisors is an integer number (1132428).

Almost surely, 2^3963491 is an apocalyptic number.

3963491 is a deficient number, since it is larger than the sum of its proper divisors (566221).

3963491 is an equidigital number, since it uses as much as digits as its factorization.

3963491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566220.

The product of its digits is 17496, while the sum is 35.

The square root of 3963491 is about 1990.8518277361. The cubic root of 3963491 is about 158.2556748130.

The spelling of 3963491 in words is "three million, nine hundred sixty-three thousand, four hundred ninety-one".