16874581 has 2 divisors, whose sum is σ = 16874582. Its totient is φ = 16874580.

The previous prime is 16874567. The next prime is 16874587. The reversal of 16874581 is 18547861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16532356 + 342225 = 4066^2 + 585^2 .

It is an emirp because it is prime and its reverse (18547861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16874581 - 2⁹ = 16874069 is a prime.

It is a super-2 number, since 2×16874581² = 569502967851122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16874587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8437290 + 8437291.

It is an arithmetic number, because the mean of its divisors is an integer number (8437291).

Almost surely, 2^16874581 is an apocalyptic number.

It is an amenable number.

16874581 is a deficient number, since it is larger than the sum of its proper divisors (1).

16874581 is an equidigital number, since it uses as much as digits as its factorization.

16874581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 40.

The square root of 16874581 is about 4107.8681819163. The cubic root of 16874581 is about 256.4942690805.

The spelling of 16874581 in words is "sixteen million, eight hundred seventy-four thousand, five hundred eighty-one".