16881017 has 4 divisors (see below), whose sum is σ = 17874036. Its totient is φ = 15888000.

The previous prime is 16881013. The next prime is 16881023. The reversal of 16881017 is 71018861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9174841 + 7706176 = 3029^2 + 2776^2 .

It is a cyclic number.

It is not a de Polignac number, because 16881017 - 2² = 16881013 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16881013) 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 in 3 ways as a sum of consecutive naturals, for example, 496484 + ... + 496517.

It is an arithmetic number, because the mean of its divisors is an integer number (4468509).

Almost surely, 2^16881017 is an apocalyptic number.

16881017 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16881017 is a deficient number, since it is larger than the sum of its proper divisors (993019).

16881017 is an equidigital number, since it uses as much as digits as its factorization.

16881017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993018.

The product of its (nonzero) digits is 2688, while the sum is 32.

The square root of 16881017 is about 4108.6514819342. The cubic root of 16881017 is about 256.5268740834.

Adding to 16881017 its reverse (71018861), we get a palindrome (87899878).

The spelling of 16881017 in words is "sixteen million, eight hundred eighty-one thousand, seventeen".