16688213 has 8 divisors (see below), whose sum is σ = 17629920. Its totient is φ = 15752880.

The previous prime is 16688207. The next prime is 16688219. The reversal of 16688213 is 31288661.

It is an interprime number because it is at equal distance from previous prime (16688207) and next prime (16688219).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16688213 - 2¹⁶ = 16622677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16688219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4403 + ... + 7263.

It is an arithmetic number, because the mean of its divisors is an integer number (2203740).

Almost surely, 2^16688213 is an apocalyptic number.

It is an amenable number.

16688213 is a deficient number, since it is larger than the sum of its proper divisors (941707).

16688213 is a wasteful number, since it uses less digits than its factorization.

16688213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3187.

The product of its digits is 13824, while the sum is 35.

The square root of 16688213 is about 4085.1209284426. The cubic root of 16688213 is about 255.5465044543.

The spelling of 16688213 in words is "sixteen million, six hundred eighty-eight thousand, two hundred thirteen".