16893917 has 2 divisors, whose sum is σ = 16893918. Its totient is φ = 16893916.

The previous prime is 16893911. The next prime is 16893931. The reversal of 16893917 is 71939861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15100996 + 1792921 = 3886^2 + 1339^2 .

It is a cyclic number.

It is not a de Polignac number, because 16893917 - 2⁴ = 16893901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16893911) 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 as a sum of consecutive naturals, namely, 8446958 + 8446959.

It is an arithmetic number, because the mean of its divisors is an integer number (8446959).

Almost surely, 2^16893917 is an apocalyptic number.

It is an amenable number.

16893917 is a deficient number, since it is larger than the sum of its proper divisors (1).

16893917 is an equidigital number, since it uses as much as digits as its factorization.

16893917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 44.

The square root of 16893917 is about 4110.2210402848. The cubic root of 16893917 is about 256.5922009947.

The spelling of 16893917 in words is "sixteen million, eight hundred ninety-three thousand, nine hundred seventeen".