3773681 has 4 divisors (see below), whose sum is σ = 3865764. Its totient is φ = 3681600.

The previous prime is 3773657. The next prime is 3773701. The reversal of 3773681 is 1863773.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1863773 = 293 ⋅6361.

It can be written as a sum of positive squares in 2 ways, for example, as 1018081 + 2755600 = 1009^2 + 1660^2 .

It is a cyclic number.

It is not a de Polignac number, because 3773681 - 2⁶ = 3773617 is a prime.

It is a super-2 number, since 2×3773681² = 28481336579522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3773621) 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, 45980 + ... + 46061.

It is an arithmetic number, because the mean of its divisors is an integer number (966441).

Almost surely, 2^3773681 is an apocalyptic number.

It is an amenable number.

3773681 is a deficient number, since it is larger than the sum of its proper divisors (92083).

3773681 is an equidigital number, since it uses as much as digits as its factorization.

3773681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92082.

The product of its digits is 21168, while the sum is 35.

The square root of 3773681 is about 1942.5964583516. The cubic root of 3773681 is about 155.6879720747.

The spelling of 3773681 in words is "three million, seven hundred seventy-three thousand, six hundred eighty-one".