11969665 has 4 divisors (see below), whose sum is σ = 14363604. Its totient is φ = 9575728.

The previous prime is 11969647. The next prime is 11969669. The reversal of 11969665 is 56696911.

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 5089536 + 6880129 = 2256^2 + 2623^2 .

It is a cyclic number.

It is not a de Polignac number, because 11969665 - 2¹¹ = 11967617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11969669) 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, 1196962 + ... + 1196971.

It is an arithmetic number, because the mean of its divisors is an integer number (3590901).

Almost surely, 2^11969665 is an apocalyptic number.

It is an amenable number.

11969665 is a deficient number, since it is larger than the sum of its proper divisors (2393939).

11969665 is an equidigital number, since it uses as much as digits as its factorization.

11969665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393938.

The product of its digits is 87480, while the sum is 43.

The square root of 11969665 is about 3459.7203644225. The cubic root of 11969665 is about 228.7497695758.

The spelling of 11969665 in words is "eleven million, nine hundred sixty-nine thousand, six hundred sixty-five".