3945493 has 4 divisors (see below), whose sum is σ = 3951180. Its totient is φ = 3939808.

The previous prime is 3945467. The next prime is 3945527.

3945493 is nontrivially palindromic in base 10.

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 2365444 + 1580049 = 1538^2 + 1257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3945493 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 (3945413) 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, 1630 + ... + 3247.

It is an arithmetic number, because the mean of its divisors is an integer number (987795).

Almost surely, 2^3945493 is an apocalyptic number.

It is an amenable number.

3945493 is a deficient number, since it is larger than the sum of its proper divisors (5687).

3945493 is an equidigital number, since it uses as much as digits as its factorization.

3945493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5686.

The product of its digits is 58320, while the sum is 37.

The square root of 3945493 is about 1986.3265089104. The cubic root of 3945493 is about 158.0157678009.

The spelling of 3945493 in words is "three million, nine hundred forty-five thousand, four hundred ninety-three".