10663909 has 4 divisors (see below), whose sum is σ = 11031660. Its totient is φ = 10296160.

The previous prime is 10663903. The next prime is 10663931. The reversal of 10663909 is 90936601.

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 2879809 + 7784100 = 1697^2 + 2790^2 .

It is not a de Polignac number, because 10663909 - 2³ = 10663901 is a prime.

It is a super-2 number, since 2×10663909² = 227437910320562, 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 (10663901) 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, 183832 + ... + 183889.

It is an arithmetic number, because the mean of its divisors is an integer number (2757915).

Almost surely, 2^10663909 is an apocalyptic number.

It is an amenable number.

10663909 is a deficient number, since it is larger than the sum of its proper divisors (367751).

10663909 is an equidigital number, since it uses as much as digits as its factorization.

10663909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367750.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 10663909 is about 3265.5641166573. The cubic root of 10663909 is about 220.1095115940.

The spelling of 10663909 in words is "ten million, six hundred sixty-three thousand, nine hundred nine".