11663109 has 20 divisors (see below), whose sum is σ = 17595820. Its totient is φ = 7698240.

The previous prime is 11663101. The next prime is 11663117. The reversal of 11663109 is 90136611.

11663109 = T₂₁₂ + T₂₁₃ + ... + T₄₂₉.

11663109 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11663101) and next prime (11663117).

It can be written as a sum of positive squares in 2 ways, for example, as 9641025 + 2022084 = 3105^2 + 1422^2 .

It is not a de Polignac number, because 11663109 - 2³ = 11663101 is a prime.

It is a super-2 number, since 2×11663109² = 272056223091762, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11663101) 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 19 ways as a sum of consecutive naturals, for example, 8169 + ... + 9489.

It is an arithmetic number, because the mean of its divisors is an integer number (879791).

Almost surely, 2^11663109 is an apocalyptic number.

It is an amenable number.

11663109 is a deficient number, since it is larger than the sum of its proper divisors (5932711).

11663109 is a wasteful number, since it uses less digits than its factorization.

11663109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442 (or 1433 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 11663109 is about 3415.1294265372. The cubic root of 11663109 is about 226.7800141959.

The spelling of 11663109 in words is "eleven million, six hundred sixty-three thousand, one hundred nine".