16855393 has 2 divisors, whose sum is σ = 16855394. Its totient is φ = 16855392.

The previous prime is 16855373. The next prime is 16855417. The reversal of 16855393 is 39355861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16136289 + 719104 = 4017^2 + 848^2 .

It is a cyclic number.

It is not a de Polignac number, because 16855393 - 2¹⁷ = 16724321 is a prime.

It is not a weakly prime, because it can be changed into another prime (16855303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8427696 + 8427697.

It is an arithmetic number, because the mean of its divisors is an integer number (8427697).

Almost surely, 2^16855393 is an apocalyptic number.

It is an amenable number.

16855393 is a deficient number, since it is larger than the sum of its proper divisors (1).

16855393 is an equidigital number, since it uses as much as digits as its factorization.

16855393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 40.

The square root of 16855393 is about 4105.5319996317. The cubic root of 16855393 is about 256.3970127661.

The spelling of 16855393 in words is "sixteen million, eight hundred fifty-five thousand, three hundred ninety-three".