16887553 has 2 divisors, whose sum is σ = 16887554. Its totient is φ = 16887552.

The previous prime is 16887539. The next prime is 16887557. The reversal of 16887553 is 35578861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8952064 + 7935489 = 2992^2 + 2817^2 .

It is a cyclic number.

It is not a de Polignac number, because 16887553 - 2⁹ = 16887041 is a prime.

It is not a weakly prime, because it can be changed into another prime (16887557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8443776 + 8443777.

It is an arithmetic number, because the mean of its divisors is an integer number (8443777).

Almost surely, 2^16887553 is an apocalyptic number.

It is an amenable number.

16887553 is a deficient number, since it is larger than the sum of its proper divisors (1).

16887553 is an equidigital number, since it uses as much as digits as its factorization.

16887553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 43.

The square root of 16887553 is about 4109.4467997530. The cubic root of 16887553 is about 256.5599772095.

The spelling of 16887553 in words is "sixteen million, eight hundred eighty-seven thousand, five hundred fifty-three".