11892981 has 8 divisors (see below), whose sum is σ = 16035840. Its totient is φ = 7839392.

The previous prime is 11892977. The next prime is 11892989. The reversal of 11892981 is 18929811.

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 11892981 - 2² = 11892977 is a prime.

It is a super-2 number, since 2×11892981² = 282885994132722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11892989) 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, 22005 + ... + 22538.

It is an arithmetic number, because the mean of its divisors is an integer number (2004480).

Almost surely, 2^11892981 is an apocalyptic number.

It is an amenable number.

11892981 is a deficient number, since it is larger than the sum of its proper divisors (4142859).

11892981 is an equidigital number, since it uses as much as digits as its factorization.

11892981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44635.

The product of its digits is 10368, while the sum is 39.

The square root of 11892981 is about 3448.6201588461. The cubic root of 11892981 is about 228.2602253501.

The spelling of 11892981 in words is "eleven million, eight hundred ninety-two thousand, nine hundred eighty-one".