3673645 has 4 divisors (see below), whose sum is σ = 4408380. Its totient is φ = 2938912.

The previous prime is 3673639. The next prime is 3673651. The reversal of 3673645 is 5463763.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5463763 = 1543 ⋅3541.

It is an interprime number because it is at equal distance from previous prime (3673639) and next prime (3673651).

It can be written as a sum of positive squares in 2 ways, for example, as 2468041 + 1205604 = 1571^2 + 1098^2 .

It is a cyclic number.

It is not a de Polignac number, because 3673645 - 2⁵ = 3673613 is a prime.

It is a super-3 number, since 3×3673645³ (a number of 21 digits) contains 333 as substring.

3673645 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3673645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367360 + ... + 367369.

It is an arithmetic number, because the mean of its divisors is an integer number (1102095).

Almost surely, 2^3673645 is an apocalyptic number.

It is an amenable number.

3673645 is a deficient number, since it is larger than the sum of its proper divisors (734735).

3673645 is an equidigital number, since it uses as much as digits as its factorization.

3673645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734734.

The product of its digits is 45360, while the sum is 34.

The square root of 3673645 is about 1916.6755072260. The cubic root of 3673645 is about 154.2999298989.

The spelling of 3673645 in words is "three million, six hundred seventy-three thousand, six hundred forty-five".