12093981 has 4 divisors (see below), whose sum is σ = 16125312. Its totient is φ = 8062652.

The previous prime is 12093979. The next prime is 12093989. The reversal of 12093981 is 18939021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18939021 = 3 ⋅6313007.

It is a cyclic number.

It is not a de Polignac number, because 12093981 - 2¹ = 12093979 is a prime.

It is a super-2 number, since 2×12093981² = 292528752856722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12093989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2015661 + ... + 2015666.

It is an arithmetic number, because the mean of its divisors is an integer number (4031328).

Almost surely, 2^12093981 is an apocalyptic number.

It is an amenable number.

12093981 is a deficient number, since it is larger than the sum of its proper divisors (4031331).

12093981 is an equidigital number, since it uses as much as digits as its factorization.

12093981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4031330.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 12093981 is about 3477.6401481464. The cubic root of 12093981 is about 229.5389693700.

The spelling of 12093981 in words is "twelve million, ninety-three thousand, nine hundred eighty-one".