11992681 has 8 divisors (see below), whose sum is σ = 12394944. Its totient is φ = 11597040.

The previous prime is 11992679. The next prime is 11992693. The reversal of 11992681 is 18629911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11992681 - 2¹ = 11992679 is a prime.

It is a super-2 number, since 2×11992681² = 287648795135522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11992681.

It is not an unprimeable number, because it can be changed into a prime (11992621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2170 + ... + 5356.

It is an arithmetic number, because the mean of its divisors is an integer number (1549368).

Almost surely, 2^11992681 is an apocalyptic number.

It is an amenable number.

11992681 is a deficient number, since it is larger than the sum of its proper divisors (402263).

11992681 is an equidigital number, since it uses as much as digits as its factorization.

11992681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3311.

The product of its digits is 7776, while the sum is 37.

The square root of 11992681 is about 3463.0450473536. The cubic root of 11992681 is about 228.8962936915.

The spelling of 11992681 in words is "eleven million, nine hundred ninety-two thousand, six hundred eighty-one".