12090931 has 2 divisors, whose sum is σ = 12090932. Its totient is φ = 12090930.

The previous prime is 12090889. The next prime is 12090937. The reversal of 12090931 is 13909021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12090931 - 2¹⁷ = 11959859 is a prime.

It is a super-2 number, since 2×12090931² = 292381224893522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12090896 and 12090905.

It is not a weakly prime, because it can be changed into another prime (12090937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6045465 + 6045466.

It is an arithmetic number, because the mean of its divisors is an integer number (6045466).

Almost surely, 2^12090931 is an apocalyptic number.

12090931 is a deficient number, since it is larger than the sum of its proper divisors (1).

12090931 is an equidigital number, since it uses as much as digits as its factorization.

12090931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 12090931 is about 3477.2016047391. The cubic root of 12090931 is about 229.5196718170.

Adding to 12090931 its reverse (13909021), we get a palindrome (25999952).

The spelling of 12090931 in words is "twelve million, ninety thousand, nine hundred thirty-one".