3921493 has 4 divisors (see below), whose sum is σ = 3957580. Its totient is φ = 3885408.

The previous prime is 3921451. The next prime is 3921497. The reversal of 3921493 is 3941293.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3392964 + 528529 = 1842^2 + 727^2 .

It is a cyclic number.

It is not a de Polignac number, because 3921493 - 2⁹ = 3920981 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 (3921497) 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, 17880 + ... + 18097.

It is an arithmetic number, because the mean of its divisors is an integer number (989395).

Almost surely, 2^3921493 is an apocalyptic number.

It is an amenable number.

3921493 is a deficient number, since it is larger than the sum of its proper divisors (36087).

3921493 is a wasteful number, since it uses less digits than its factorization.

3921493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36086.

The product of its digits is 5832, while the sum is 31.

The square root of 3921493 is about 1980.2759908659. The cubic root of 3921493 is about 157.6947184366.

The spelling of 3921493 in words is "three million, nine hundred twenty-one thousand, four hundred ninety-three".