3645613 has 4 divisors (see below), whose sum is σ = 3691840. Its totient is φ = 3599388.

The previous prime is 3645611. The next prime is 3645623. The reversal of 3645613 is 3165463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3645613 - 2¹ = 3645611 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645611) 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, 22995 + ... + 23152.

It is an arithmetic number, because the mean of its divisors is an integer number (922960).

Almost surely, 2^3645613 is an apocalyptic number.

It is an amenable number.

3645613 is a deficient number, since it is larger than the sum of its proper divisors (46227).

3645613 is an equidigital number, since it uses as much as digits as its factorization.

3645613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46226.

The product of its digits is 6480, while the sum is 28.

The square root of 3645613 is about 1909.3488418830. The cubic root of 3645613 is about 153.9064620034.

The spelling of 3645613 in words is "three million, six hundred forty-five thousand, six hundred thirteen".