16997871 has 8 divisors (see below), whose sum is σ = 24724224. Its totient is φ = 10301720.

The previous prime is 16997867. The next prime is 16997887. The reversal of 16997871 is 17879961.

It is a happy number.

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

It is not a de Polignac number, because 16997871 - 2² = 16997867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16997871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16997801) 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, 257511 + ... + 257576.

It is an arithmetic number, because the mean of its divisors is an integer number (3090528).

Almost surely, 2^16997871 is an apocalyptic number.

16997871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16997871 is a deficient number, since it is larger than the sum of its proper divisors (7726353).

16997871 is a wasteful number, since it uses less digits than its factorization.

16997871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515101.

The product of its digits is 190512, while the sum is 48.

The square root of 16997871 is about 4122.8474383610. The cubic root of 16997871 is about 257.1174247775.

The spelling of 16997871 in words is "sixteen million, nine hundred ninety-seven thousand, eight hundred seventy-one".