3916645 has 4 divisors (see below), whose sum is σ = 4699980. Its totient is φ = 3133312.

The previous prime is 3916643. The next prime is 3916663. The reversal of 3916645 is 5466193.

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 708964 + 3207681 = 842^2 + 1791^2 .

It is a cyclic number.

It is not a de Polignac number, because 3916645 - 2¹ = 3916643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3916645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3916643) 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, 391660 + ... + 391669.

It is an arithmetic number, because the mean of its divisors is an integer number (1174995).

Almost surely, 2^3916645 is an apocalyptic number.

It is an amenable number.

3916645 is a deficient number, since it is larger than the sum of its proper divisors (783335).

3916645 is an equidigital number, since it uses as much as digits as its factorization.

3916645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783334.

The product of its digits is 19440, while the sum is 34.

The square root of 3916645 is about 1979.0515405113. The cubic root of 3916645 is about 157.6297075462.

The spelling of 3916645 in words is "three million, nine hundred sixteen thousand, six hundred forty-five".