16091893 has 4 divisors (see below), whose sum is σ = 16107660. Its totient is φ = 16076128.

The previous prime is 16091869. The next prime is 16091899. The reversal of 16091893 is 39819061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39819061 = 643 ⋅61927.

It can be written as a sum of positive squares in 2 ways, for example, as 7436529 + 8655364 = 2727^2 + 2942^2 .

It is a cyclic number.

It is not a de Polignac number, because 16091893 - 2¹⁷ = 15960821 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 (16091899) 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, 6238 + ... + 8431.

It is an arithmetic number, because the mean of its divisors is an integer number (4026915).

Almost surely, 2^16091893 is an apocalyptic number.

It is an amenable number.

16091893 is a deficient number, since it is larger than the sum of its proper divisors (15767).

16091893 is a wasteful number, since it uses less digits than its factorization.

16091893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15766.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 16091893 is about 4011.4701793731. The cubic root of 16091893 is about 252.4656973955.

The spelling of 16091893 in words is "sixteen million, ninety-one thousand, eight hundred ninety-three".