16455409 has 2 divisors, whose sum is σ = 16455410. Its totient is φ = 16455408.

The previous prime is 16455367. The next prime is 16455427. The reversal of 16455409 is 90455461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11370384 + 5085025 = 3372^2 + 2255^2 .

It is a cyclic number.

It is not a de Polignac number, because 16455409 - 2⁹ = 16454897 is a prime.

It is not a weakly prime, because it can be changed into another prime (16455449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8227704 + 8227705.

It is an arithmetic number, because the mean of its divisors is an integer number (8227705).

Almost surely, 2^16455409 is an apocalyptic number.

It is an amenable number.

16455409 is a deficient number, since it is larger than the sum of its proper divisors (1).

16455409 is an equidigital number, since it uses as much as digits as its factorization.

16455409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 16455409 is about 4056.5267162931. The cubic root of 16455409 is about 254.3526267633.

The spelling of 16455409 in words is "sixteen million, four hundred fifty-five thousand, four hundred nine".