16887161 has 2 divisors, whose sum is σ = 16887162. Its totient is φ = 16887160.

The previous prime is 16887151. The next prime is 16887191. The reversal of 16887161 is 16178861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12709225 + 4177936 = 3565^2 + 2044^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16887161 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16887131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8443580 + 8443581.

It is an arithmetic number, because the mean of its divisors is an integer number (8443581).

Almost surely, 2^16887161 is an apocalyptic number.

It is an amenable number.

16887161 is a deficient number, since it is larger than the sum of its proper divisors (1).

16887161 is an equidigital number, since it uses as much as digits as its factorization.

16887161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 38.

The square root of 16887161 is about 4109.3991044920. The cubic root of 16887161 is about 256.5579920731.

The spelling of 16887161 in words is "sixteen million, eight hundred eighty-seven thousand, one hundred sixty-one".