10749509 has 8 divisors (see below), whose sum is σ = 10935000. Its totient is φ = 10565632.

The previous prime is 10749493. The next prime is 10749581. The reversal of 10749509 is 90594701.

It can be written as a sum of positive squares in 4 ways, for example, as 4225 + 10745284 = 65^2 + 3278^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10749509 - 2⁴ = 10749493 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 (10749709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23717 + ... + 24165.

It is an arithmetic number, because the mean of its divisors is an integer number (1366875).

Almost surely, 2^10749509 is an apocalyptic number.

It is an amenable number.

10749509 is a deficient number, since it is larger than the sum of its proper divisors (185491).

10749509 is an equidigital number, since it uses as much as digits as its factorization.

10749509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 10749509 is about 3278.6443844980. The cubic root of 10749509 is about 220.6968879524.

The spelling of 10749509 in words is "ten million, seven hundred forty-nine thousand, five hundred nine".