16891293 has 4 divisors (see below), whose sum is σ = 22521728. Its totient is φ = 11260860.

The previous prime is 16891267. The next prime is 16891307. The reversal of 16891293 is 39219861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16891293 - 2⁸ = 16891037 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 (16891213) 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 in 3 ways as a sum of consecutive naturals, for example, 2815213 + ... + 2815218.

It is an arithmetic number, because the mean of its divisors is an integer number (5630432).

Almost surely, 2^16891293 is an apocalyptic number.

It is an amenable number.

16891293 is a deficient number, since it is larger than the sum of its proper divisors (5630435).

16891293 is an equidigital number, since it uses as much as digits as its factorization.

16891293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5630434.

The product of its digits is 23328, while the sum is 39.

The square root of 16891293 is about 4109.9018236449. The cubic root of 16891293 is about 256.5789154869.

The spelling of 16891293 in words is "sixteen million, eight hundred ninety-one thousand, two hundred ninety-three".