3640013 has 4 divisors (see below), whose sum is σ = 3920028. Its totient is φ = 3360000.

The previous prime is 3639997. The next prime is 3640019. The reversal of 3640013 is 3100463.

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 619369 + 3020644 = 787^2 + 1738^2 .

It is a cyclic number.

It is not a de Polignac number, because 3640013 - 2⁴ = 3639997 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 3639973 and 3640000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640019) 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, 139988 + ... + 140013.

It is an arithmetic number, because the mean of its divisors is an integer number (980007).

Almost surely, 2^3640013 is an apocalyptic number.

It is an amenable number.

3640013 is a deficient number, since it is larger than the sum of its proper divisors (280015).

3640013 is a wasteful number, since it uses less digits than its factorization.

3640013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280014.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 3640013 is about 1907.8818097566. The cubic root of 3640013 is about 153.8276167473.

Adding to 3640013 its reverse (3100463), we get a palindrome (6740476).

The spelling of 3640013 in words is "three million, six hundred forty thousand, thirteen".