16697121 has 8 divisors (see below), whose sum is σ = 25443264. Its totient is φ = 9541200.

The previous prime is 16697117. The next prime is 16697147. The reversal of 16697121 is 12179661.

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

It is not a de Polignac number, because 16697121 - 2² = 16697117 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16697171) 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, 397530 + ... + 397571.

It is an arithmetic number, because the mean of its divisors is an integer number (3180408).

Almost surely, 2^16697121 is an apocalyptic number.

It is an amenable number.

16697121 is a deficient number, since it is larger than the sum of its proper divisors (8746143).

16697121 is an equidigital number, since it uses as much as digits as its factorization.

16697121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795111.

The product of its digits is 4536, while the sum is 33.

The square root of 16697121 is about 4086.2110811851. The cubic root of 16697121 is about 255.5919657497.

The spelling of 16697121 in words is "sixteen million, six hundred ninety-seven thousand, one hundred twenty-one".