3506749 has 4 divisors (see below), whose sum is σ = 3601564. Its totient is φ = 3411936.

The previous prime is 3506719. The next prime is 3506753. The reversal of 3506749 is 9476053.

3506749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9476053 = 509 ⋅18617.

It can be written as a sum of positive squares in 2 ways, for example, as 1863225 + 1643524 = 1365^2 + 1282^2 .

It is a cyclic number.

It is not a de Polignac number, because 3506749 - 2¹¹ = 3504701 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 (3506719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47352 + ... + 47425.

It is an arithmetic number, because the mean of its divisors is an integer number (900391).

Almost surely, 2^3506749 is an apocalyptic number.

It is an amenable number.

3506749 is a deficient number, since it is larger than the sum of its proper divisors (94815).

3506749 is an equidigital number, since it uses as much as digits as its factorization.

3506749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94814.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 3506749 is about 1872.6315708115. The cubic root of 3506749 is about 151.9269761192.

The spelling of 3506749 in words is "three million, five hundred six thousand, seven hundred forty-nine".