10940509 has 4 divisors (see below), whose sum is σ = 10967040. Its totient is φ = 10913980.

The previous prime is 10940491. The next prime is 10940513. The reversal of 10940509 is 90504901.

10940509 is digitally balanced in base 3, 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90504901 = 89 ⋅1016909.

It is a cyclic number.

It is not a de Polignac number, because 10940509 - 2⁵ = 10940477 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 (10940549) 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, 12637 + ... + 13474.

It is an arithmetic number, because the mean of its divisors is an integer number (2741760).

Almost surely, 2^10940509 is an apocalyptic number.

It is an amenable number.

10940509 is a deficient number, since it is larger than the sum of its proper divisors (26531).

10940509 is an equidigital number, since it uses as much as digits as its factorization.

10940509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26530.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 10940509 is about 3307.6440255868. The cubic root of 10940509 is about 221.9963544027.

It can be divided in two parts, 10940 and 509, that added together give a square (11449 = 107²).

The spelling of 10940509 in words is "ten million, nine hundred forty thousand, five hundred nine".