16782449 has 2 divisors, whose sum is σ = 16782450. Its totient is φ = 16782448.

The previous prime is 16782419. The next prime is 16782457. The reversal of 16782449 is 94428761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13191424 + 3591025 = 3632^2 + 1895^2 .

It is a cyclic number.

It is not a de Polignac number, because 16782449 - 2²⁴ = 5233 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16782419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8391224 + 8391225.

It is an arithmetic number, because the mean of its divisors is an integer number (8391225).

Almost surely, 2^16782449 is an apocalyptic number.

It is an amenable number.

16782449 is a deficient number, since it is larger than the sum of its proper divisors (1).

16782449 is an equidigital number, since it uses as much as digits as its factorization.

16782449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 41.

The square root of 16782449 is about 4096.6387441413. The cubic root of 16782449 is about 256.0266136475.

The spelling of 16782449 in words is "sixteen million, seven hundred eighty-two thousand, four hundred forty-nine".