16327891 has 2 divisors, whose sum is σ = 16327892. Its totient is φ = 16327890.

The previous prime is 16327877. The next prime is 16327903. The reversal of 16327891 is 19872361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16327891 - 2⁹ = 16327379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16327891.

It is not a weakly prime, because it can be changed into another prime (16321891) 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 as a sum of consecutive naturals, namely, 8163945 + 8163946.

It is an arithmetic number, because the mean of its divisors is an integer number (8163946).

Almost surely, 2^16327891 is an apocalyptic number.

16327891 is a deficient number, since it is larger than the sum of its proper divisors (1).

16327891 is an equidigital number, since it uses as much as digits as its factorization.

16327891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 37.

The square root of 16327891 is about 4040.7785140985. The cubic root of 16327891 is about 253.6939034918.

The spelling of 16327891 in words is "sixteen million, three hundred twenty-seven thousand, eight hundred ninety-one".