16400459 has 2 divisors, whose sum is σ = 16400460. Its totient is φ = 16400458.

The previous prime is 16400453. The next prime is 16400473. The reversal of 16400459 is 95400461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16400459 - 2⁸ = 16400203 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (16400453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8200229 + 8200230.

It is an arithmetic number, because the mean of its divisors is an integer number (8200230).

Almost surely, 2^16400459 is an apocalyptic number.

16400459 is a deficient number, since it is larger than the sum of its proper divisors (1).

16400459 is an equidigital number, since it uses as much as digits as its factorization.

16400459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 16400459 is about 4049.7480168524. The cubic root of 16400459 is about 254.0691887899.

The spelling of 16400459 in words is "sixteen million, four hundred thousand, four hundred fifty-nine".