12000091 has 2 divisors, whose sum is σ = 12000092. Its totient is φ = 12000090.

The previous prime is 12000073. The next prime is 12000097. The reversal of 12000091 is 19000021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12000091 - 2¹¹ = 11998043 is a prime.

12000091 is a modest number, since divided by 91 gives 12 as remainder.

It is not a weakly prime, because it can be changed into another prime (12000097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000045 + 6000046.

It is an arithmetic number, because the mean of its divisors is an integer number (6000046).

Almost surely, 2^12000091 is an apocalyptic number.

12000091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12000091 is an equidigital number, since it uses as much as digits as its factorization.

12000091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 12000091 is about 3464.1147498315. The cubic root of 12000091 is about 228.9434272258.

The spelling of 12000091 in words is "twelve million, ninety-one", and thus it is an aban number and an uban number.