16798553 has 2 divisors, whose sum is σ = 16798554. Its totient is φ = 16798552.

The previous prime is 16798549. The next prime is 16798571. The reversal of 16798553 is 35589761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16540489 + 258064 = 4067^2 + 508^2 .

It is an emirp because it is prime and its reverse (35589761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16798553 - 2² = 16798549 is a prime.

It is not a weakly prime, because it can be changed into another prime (16798543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8399276 + 8399277.

It is an arithmetic number, because the mean of its divisors is an integer number (8399277).

Almost surely, 2^16798553 is an apocalyptic number.

It is an amenable number.

16798553 is a deficient number, since it is larger than the sum of its proper divisors (1).

16798553 is an equidigital number, since it uses as much as digits as its factorization.

16798553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 44.

The square root of 16798553 is about 4098.6037866571. The cubic root of 16798553 is about 256.1084796195.

The spelling of 16798553 in words is "sixteen million, seven hundred ninety-eight thousand, five hundred fifty-three".