3509993 has 4 divisors (see below), whose sum is σ = 3533700. Its totient is φ = 3486288.

The previous prime is 3509983. The next prime is 3509999. The reversal of 3509993 is 3999053.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 135424 + 3374569 = 368^2 + 1837^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3509993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3509999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11630 + ... + 11927.

It is an arithmetic number, because the mean of its divisors is an integer number (883425).

Almost surely, 2^3509993 is an apocalyptic number.

It is an amenable number.

3509993 is a deficient number, since it is larger than the sum of its proper divisors (23707).

3509993 is a wasteful number, since it uses less digits than its factorization.

3509993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23706.

The product of its (nonzero) digits is 32805, while the sum is 38.

The square root of 3509993 is about 1873.4975313568. The cubic root of 3509993 is about 151.9738095457.

The spelling of 3509993 in words is "three million, five hundred nine thousand, nine hundred ninety-three".