16997686 has 8 divisors (see below), whose sum is σ = 25722504. Its totient is φ = 8423520.

The previous prime is 16997677. The next prime is 16997693. The reversal of 16997686 is 68679961.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37380 + ... + 37831.

It is an arithmetic number, because the mean of its divisors is an integer number (3215313).

Almost surely, 2^16997686 is an apocalyptic number.

16997686 is a deficient number, since it is larger than the sum of its proper divisors (8724818).

16997686 is a wasteful number, since it uses less digits than its factorization.

16997686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75326.

The product of its digits is 979776, while the sum is 52.

The square root of 16997686 is about 4122.8250023497. The cubic root of 16997686 is about 257.1164919764.

The spelling of 16997686 in words is "sixteen million, nine hundred ninety-seven thousand, six hundred eighty-six".