16858393 has 4 divisors (see below), whose sum is σ = 16882560. Its totient is φ = 16834228.

The previous prime is 16858381. The next prime is 16858411. The reversal of 16858393 is 39385861.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16858393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16858313) 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, 11005 + ... + 12442.

It is an arithmetic number, because the mean of its divisors is an integer number (4220640).

Almost surely, 2^16858393 is an apocalyptic number.

It is an amenable number.

16858393 is a deficient number, since it is larger than the sum of its proper divisors (24167).

16858393 is an equidigital number, since it uses as much as digits as its factorization.

16858393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24166.

The product of its digits is 155520, while the sum is 43.

The square root of 16858393 is about 4105.8973440650. The cubic root of 16858393 is about 256.4122234351.

The spelling of 16858393 in words is "sixteen million, eight hundred fifty-eight thousand, three hundred ninety-three".