11649965 has 8 divisors (see below), whose sum is σ = 14017560. Its totient is φ = 9294912.

The previous prime is 11649959. The next prime is 11649971. The reversal of 11649965 is 56994611.

11649965 = 2413² + 2414².

It is an interprime number because it is at equal distance from previous prime (11649959) and next prime (11649971).

It can be written as a sum of positive squares in 4 ways, for example, as 346921 + 11303044 = 589^2 + 3362^2 .

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 11649965 - 2⁶ = 11649901 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 950 + ... + 4919.

It is an arithmetic number, because the mean of its divisors is an integer number (1752195).

Almost surely, 2^11649965 is an apocalyptic number.

11649965 is the 2414-th centered square number.

It is an amenable number.

11649965 is a deficient number, since it is larger than the sum of its proper divisors (2367595).

11649965 is an equidigital number, since it uses as much as digits as its factorization.

11649965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6271.

The product of its digits is 58320, while the sum is 41.

The square root of 11649965 is about 3413.2045060324. The cubic root of 11649965 is about 226.6947905799.

The spelling of 11649965 in words is "eleven million, six hundred forty-nine thousand, nine hundred sixty-five".