16858987 has 2 divisors, whose sum is σ = 16858988. Its totient is φ = 16858986.

The previous prime is 16858979. The next prime is 16859033. The reversal of 16858987 is 78985861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16858987 - 2³ = 16858979 is a prime.

It is not a weakly prime, because it can be changed into another prime (16858957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8429493 + 8429494.

It is an arithmetic number, because the mean of its divisors is an integer number (8429494).

Almost surely, 2^16858987 is an apocalyptic number.

16858987 is a deficient number, since it is larger than the sum of its proper divisors (1).

16858987 is an equidigital number, since it uses as much as digits as its factorization.

16858987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 52.

The square root of 16858987 is about 4105.9696784073. The cubic root of 16858987 is about 256.4152349335.

The spelling of 16858987 in words is "sixteen million, eight hundred fifty-eight thousand, nine hundred eighty-seven".