16971897 has 4 divisors (see below), whose sum is σ = 22629200. Its totient is φ = 11314596.

The previous prime is 16971893. The next prime is 16971919. The reversal of 16971897 is 79817961.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16971897 - 2² = 16971893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16971893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2828647 + ... + 2828652.

It is an arithmetic number, because the mean of its divisors is an integer number (5657300).

Almost surely, 2^16971897 is an apocalyptic number.

It is an amenable number.

16971897 is a deficient number, since it is larger than the sum of its proper divisors (5657303).

16971897 is an equidigital number, since it uses as much as digits as its factorization.

16971897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5657302.

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

The square root of 16971897 is about 4119.6962266653. The cubic root of 16971897 is about 256.9863932195.

The spelling of 16971897 in words is "sixteen million, nine hundred seventy-one thousand, eight hundred ninety-seven".