11663972 has 12 divisors (see below), whose sum is σ = 21612780. Its totient is φ = 5488896.

The previous prime is 11663957. The next prime is 11663983. The reversal of 11663972 is 27936611.

It can be written as a sum of positive squares in 2 ways, for example, as 6885376 + 4778596 = 2624^2 + 2186^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 85697 + ... + 85832.

It is an arithmetic number, because the mean of its divisors is an integer number (1801065).

Almost surely, 2^11663972 is an apocalyptic number.

It is an amenable number.

11663972 is a deficient number, since it is larger than the sum of its proper divisors (9948808).

11663972 is a wasteful number, since it uses less digits than its factorization.

11663972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171550 (or 171548 counting only the distinct ones).

The product of its digits is 13608, while the sum is 35.

The square root of 11663972 is about 3415.2557737306. The cubic root of 11663972 is about 226.7856075108.

The spelling of 11663972 in words is "eleven million, six hundred sixty-three thousand, nine hundred seventy-two".