11969649 has 12 divisors (see below), whose sum is σ = 18306756. Its totient is φ = 7510272.

The previous prime is 11969647. The next prime is 11969669. The reversal of 11969649 is 94696911.

11969649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3744225 + 8225424 = 1935^2 + 2868^2 .

It is not a de Polignac number, because 11969649 - 2¹ = 11969647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11969647) 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, 38964 + ... + 39269.

It is an arithmetic number, because the mean of its divisors is an integer number (1525563).

Almost surely, 2^11969649 is an apocalyptic number.

It is an amenable number.

11969649 is a deficient number, since it is larger than the sum of its proper divisors (6337107).

11969649 is a wasteful number, since it uses less digits than its factorization.

11969649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78256 (or 78253 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 11969649 is about 3459.7180520962. The cubic root of 11969649 is about 228.7496676516.

The spelling of 11969649 in words is "eleven million, nine hundred sixty-nine thousand, six hundred forty-nine".