11981716 has 12 divisors (see below), whose sum is σ = 21161140. Its totient is φ = 5935680.

The previous prime is 11981713. The next prime is 11981743. The reversal of 11981716 is 61718911.

It can be written as a sum of positive squares in 2 ways, for example, as 10265616 + 1716100 = 3204^2 + 1310^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11981713) by changing a digit.

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, 13305 + ... + 14176.

Almost surely, 2^11981716 is an apocalyptic number.

It is an amenable number.

11981716 is a deficient number, since it is larger than the sum of its proper divisors (9179424).

11981716 is a wasteful number, since it uses less digits than its factorization.

11981716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27594 (or 27592 counting only the distinct ones).

The product of its digits is 3024, while the sum is 34.

The square root of 11981716 is about 3461.4615410257. The cubic root of 11981716 is about 228.8265118756.

The spelling of 11981716 in words is "eleven million, nine hundred eighty-one thousand, seven hundred sixteen".