10605509 has 4 divisors (see below), whose sum is σ = 10634316. Its totient is φ = 10576704.

The previous prime is 10605487. The next prime is 10605523. The reversal of 10605509 is 90550601.

10605509 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.

It can be written as a sum of positive squares in 2 ways, for example, as 4950625 + 5654884 = 2225^2 + 2378^2 .

It is a cyclic number.

It is not a de Polignac number, because 10605509 - 2⁸ = 10605253 is a prime.

It is a super-2 number, since 2×10605509² = 224953642298162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10605559) 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, 13844 + ... + 14589.

It is an arithmetic number, because the mean of its divisors is an integer number (2658579).

Almost surely, 2^10605509 is an apocalyptic number.

It is an amenable number.

10605509 is a deficient number, since it is larger than the sum of its proper divisors (28807).

10605509 is an equidigital number, since it uses as much as digits as its factorization.

10605509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28806.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 10605509 is about 3256.6100472731. The cubic root of 10605509 is about 219.7069721353.

The spelling of 10605509 in words is "ten million, six hundred five thousand, five hundred nine".