16005091 has 2 divisors, whose sum is σ = 16005092. Its totient is φ = 16005090.

The previous prime is 16005043. The next prime is 16005131. The reversal of 16005091 is 19050061.

It is a strong prime.

It is an emirp because it is prime and its reverse (19050061) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16005091 is a prime.

It is a super-3 number, since 3×16005091³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (16005001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8002545 + 8002546.

It is an arithmetic number, because the mean of its divisors is an integer number (8002546).

Almost surely, 2^16005091 is an apocalyptic number.

16005091 is a deficient number, since it is larger than the sum of its proper divisors (1).

16005091 is an equidigital number, since it uses as much as digits as its factorization.

16005091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 16005091 is about 4000.6363243864. The cubic root of 16005091 is about 252.0109332201.

The spelling of 16005091 in words is "sixteen million, five thousand, ninety-one".