16716869 has 4 divisors (see below), whose sum is σ = 18002796. Its totient is φ = 15430944.

The previous prime is 16716857. The next prime is 16716871. The reversal of 16716869 is 96861761.

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 10640644 + 6076225 = 3262^2 + 2465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16716869 is a prime.

It is a super-2 number, since 2×16716869² = 558907418326322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16716839) 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 in 3 ways as a sum of consecutive naturals, for example, 642944 + ... + 642969.

It is an arithmetic number, because the mean of its divisors is an integer number (4500699).

Almost surely, 2^16716869 is an apocalyptic number.

It is an amenable number.

16716869 is a deficient number, since it is larger than the sum of its proper divisors (1285927).

16716869 is a wasteful number, since it uses less digits than its factorization.

16716869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285926.

The product of its digits is 108864, while the sum is 44.

The square root of 16716869 is about 4088.6267865874. The cubic root of 16716869 is about 255.6926905303.

The spelling of 16716869 in words is "sixteen million, seven hundred sixteen thousand, eight hundred sixty-nine".