12031907 has 4 divisors (see below), whose sum is σ = 12039456. Its totient is φ = 12024360.

The previous prime is 12031891. The next prime is 12031913. The reversal of 12031907 is 70913021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 70913021 = 1493 ⋅47497.

It is a cyclic number.

It is not a de Polignac number, because 12031907 - 2⁴ = 12031891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12031307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344 + ... + 4917.

It is an arithmetic number, because the mean of its divisors is an integer number (3009864).

Almost surely, 2^12031907 is an apocalyptic number.

12031907 is a deficient number, since it is larger than the sum of its proper divisors (7549).

12031907 is an equidigital number, since it uses as much as digits as its factorization.

12031907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7548.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 12031907 is about 3468.7039366311. The cubic root of 12031907 is about 229.1455822512.

Adding to 12031907 its reverse (70913021), we get a palindrome (82944928).

The spelling of 12031907 in words is "twelve million, thirty-one thousand, nine hundred seven".