12078931 has 4 divisors (see below), whose sum is σ = 12096864. Its totient is φ = 12061000.

The previous prime is 12078923. The next prime is 12078947. The reversal of 12078931 is 13987021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13987021 = 19 ⋅736159.

It is a cyclic number.

It is not a de Polignac number, because 12078931 - 2³ = 12078923 is a prime.

It is a super-2 number, since 2×12078931² = 291801148205522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12078893 and 12078902.

It is not an unprimeable number, because it can be changed into a prime (12078971) 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, 7915 + ... + 9316.

It is an arithmetic number, because the mean of its divisors is an integer number (3024216).

Almost surely, 2^12078931 is an apocalyptic number.

12078931 is a deficient number, since it is larger than the sum of its proper divisors (17933).

12078931 is an equidigital number, since it uses as much as digits as its factorization.

12078931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17932.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 12078931 is about 3475.4756509002. The cubic root of 12078931 is about 229.4437155007.

The spelling of 12078931 in words is "twelve million, seventy-eight thousand, nine hundred thirty-one".