16091863 has 4 divisors (see below), whose sum is σ = 16118728. Its totient is φ = 16065000.

The previous prime is 16091857. The next prime is 16091869. The reversal of 16091863 is 36819061.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (16091857) and next prime (16091869).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16091863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16091869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12513 + ... + 13738.

It is an arithmetic number, because the mean of its divisors is an integer number (4029682).

Almost surely, 2^16091863 is an apocalyptic number.

16091863 is a deficient number, since it is larger than the sum of its proper divisors (26865).

16091863 is an equidigital number, since it uses as much as digits as its factorization.

16091863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26864.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 16091863 is about 4011.4664400939. The cubic root of 16091863 is about 252.4655405054.

The spelling of 16091863 in words is "sixteen million, ninety-one thousand, eight hundred sixty-three".