3773645 has 8 divisors (see below), whose sum is σ = 4538904. Its totient is φ = 3011904.

The previous prime is 3773639. The next prime is 3773657. The reversal of 3773645 is 5463773.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1142761 + 2630884 = 1069^2 + 1622^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3773645 - 2⁴ = 3773629 is a prime.

It is a super-3 number, since 3×3773645³ (a number of 21 digits) contains 333 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3287 + ... + 4283.

It is an arithmetic number, because the mean of its divisors is an integer number (567363).

Almost surely, 2^3773645 is an apocalyptic number.

It is an amenable number.

3773645 is a deficient number, since it is larger than the sum of its proper divisors (765259).

3773645 is an equidigital number, since it uses as much as digits as its factorization.

3773645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759.

The product of its digits is 52920, while the sum is 35.

The square root of 3773645 is about 1942.5871923803. The cubic root of 3773645 is about 155.6874769980.

It can be divided in two parts, 3 and 773645, that multiplied together give a triangular number (2320935 = T₂₁₅₄).

The spelling of 3773645 in words is "three million, seven hundred seventy-three thousand, six hundred forty-five".