16618873 has 2 divisors, whose sum is σ = 16618874. Its totient is φ = 16618872.

The previous prime is 16618867. The next prime is 16618933. The reversal of 16618873 is 37881661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16096144 + 522729 = 4012^2 + 723^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16618873 is a prime.

It is not a weakly prime, because it can be changed into another prime (16618813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8309436 + 8309437.

It is an arithmetic number, because the mean of its divisors is an integer number (8309437).

Almost surely, 2^16618873 is an apocalyptic number.

It is an amenable number.

16618873 is a deficient number, since it is larger than the sum of its proper divisors (1).

16618873 is an equidigital number, since it uses as much as digits as its factorization.

16618873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 16618873 is about 4076.6251973906. The cubic root of 16618873 is about 255.1920787841.

The spelling of 16618873 in words is "sixteen million, six hundred eighteen thousand, eight hundred seventy-three".