16893493 has 2 divisors, whose sum is σ = 16893494. Its totient is φ = 16893492.

The previous prime is 16893491. The next prime is 16893511. The reversal of 16893493 is 39439861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16184529 + 708964 = 4023^2 + 842^2 .

It is a cyclic number.

It is not a de Polignac number, because 16893493 - 2¹ = 16893491 is a prime.

Together with 16893491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16893491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8446746 + 8446747.

It is an arithmetic number, because the mean of its divisors is an integer number (8446747).

Almost surely, 2^16893493 is an apocalyptic number.

It is an amenable number.

16893493 is a deficient number, since it is larger than the sum of its proper divisors (1).

16893493 is an equidigital number, since it uses as much as digits as its factorization.

16893493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 43.

The square root of 16893493 is about 4110.1694612266. The cubic root of 16893493 is about 256.5900543442.

The spelling of 16893493 in words is "sixteen million, eight hundred ninety-three thousand, four hundred ninety-three".