16385891 has 2 divisors, whose sum is σ = 16385892. Its totient is φ = 16385890.

The previous prime is 16385849. The next prime is 16385927. The reversal of 16385891 is 19858361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16385891 - 2⁶ = 16385827 is a prime.

It is not a weakly prime, because it can be changed into another prime (16385801) 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, 8192945 + 8192946.

It is an arithmetic number, because the mean of its divisors is an integer number (8192946).

Almost surely, 2^16385891 is an apocalyptic number.

16385891 is a deficient number, since it is larger than the sum of its proper divisors (1).

16385891 is an equidigital number, since it uses as much as digits as its factorization.

16385891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 41.

The square root of 16385891 is about 4047.9489868327. The cubic root of 16385891 is about 253.9939393433.

The spelling of 16385891 in words is "sixteen million, three hundred eighty-five thousand, eight hundred ninety-one".