11965689 has 12 divisors (see below), whose sum is σ = 17751396. Its totient is φ = 7761312.

The previous prime is 11965673. The next prime is 11965697. The reversal of 11965689 is 98656911.

It can be written as a sum of positive squares in 2 ways, for example, as 9715689 + 2250000 = 3117^2 + 1500^2 .

It is not a de Polignac number, because 11965689 - 2⁴ = 11965673 is a prime.

It is a super-3 number, since 3×11965689³ (a number of 22 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11965619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17634 + ... + 18299.

It is an arithmetic number, because the mean of its divisors is an integer number (1479283).

Almost surely, 2^11965689 is an apocalyptic number.

It is an amenable number.

11965689 is a deficient number, since it is larger than the sum of its proper divisors (5785707).

11965689 is a wasteful number, since it uses less digits than its factorization.

11965689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35976 (or 35973 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 11965689 is about 3459.1457037829. The cubic root of 11965689 is about 228.7244386022.

The spelling of 11965689 in words is "eleven million, nine hundred sixty-five thousand, six hundred eighty-nine".