16785413 has 2 divisors, whose sum is σ = 16785414. Its totient is φ = 16785412.

The previous prime is 16785407. The next prime is 16785421. The reversal of 16785413 is 31458761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16785409 + 4 = 4097^2 + 2^2 .

It is an emirp because it is prime and its reverse (31458761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16785413 - 2¹⁶ = 16719877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16785473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8392706 + 8392707.

It is an arithmetic number, because the mean of its divisors is an integer number (8392707).

Almost surely, 2^16785413 is an apocalyptic number.

It is an amenable number.

16785413 is a deficient number, since it is larger than the sum of its proper divisors (1).

16785413 is an equidigital number, since it uses as much as digits as its factorization.

16785413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The square root of 16785413 is about 4097.0004881620. Note that the first 3 decimals coincide. The cubic root of 16785413 is about 256.0416853099.

The spelling of 16785413 in words is "sixteen million, seven hundred eighty-five thousand, four hundred thirteen".