3813749 has 4 divisors (see below), whose sum is σ = 3853164. Its totient is φ = 3774336.

The previous prime is 3813679. The next prime is 3813751. The reversal of 3813749 is 9473183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9473183 = 479 ⋅19777.

It can be written as a sum of positive squares in 2 ways, for example, as 2502724 + 1311025 = 1582^2 + 1145^2 .

It is a cyclic number.

It is not a de Polignac number, because 3813749 - 2⁸ = 3813493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3813769) 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, 19562 + ... + 19755.

It is an arithmetic number, because the mean of its divisors is an integer number (963291).

Almost surely, 2^3813749 is an apocalyptic number.

It is an amenable number.

3813749 is a deficient number, since it is larger than the sum of its proper divisors (39415).

3813749 is an equidigital number, since it uses as much as digits as its factorization.

3813749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39414.

The product of its digits is 18144, while the sum is 35.

The square root of 3813749 is about 1952.8822289119. The cubic root of 3813749 is about 156.2370519404.

The spelling of 3813749 in words is "three million, eight hundred thirteen thousand, seven hundred forty-nine".