3653749 has 4 divisors (see below), whose sum is σ = 3985920. Its totient is φ = 3321580.

The previous prime is 3653737. The next prime is 3653761. The reversal of 3653749 is 9473563.

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 an interprime number because it is at equal distance from previous prime (3653737) and next prime (3653761).

It is a cyclic number.

It is not a de Polignac number, because 3653749 - 2¹³ = 3645557 is a prime.

It is a d-powerful number, because it can be written as 3⁵ + 6⁸ + 5⁹ + 3⁹ + 7² + 4⁵ + 9 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3653779) 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, 166069 + ... + 166090.

It is an arithmetic number, because the mean of its divisors is an integer number (996480).

Almost surely, 2^3653749 is an apocalyptic number.

It is an amenable number.

3653749 is a deficient number, since it is larger than the sum of its proper divisors (332171).

3653749 is a wasteful number, since it uses less digits than its factorization.

3653749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332170.

The product of its digits is 68040, while the sum is 37.

The square root of 3653749 is about 1911.4782237839. The cubic root of 3653749 is about 154.0208691570.

It can be divided in two parts, 365 and 3749, that added together give a palindrome (4114).

The spelling of 3653749 in words is "three million, six hundred fifty-three thousand, seven hundred forty-nine".