16813897 has 8 divisors (see below), whose sum is σ = 17588160. Its totient is φ = 16043280.

The previous prime is 16813877. The next prime is 16813913. The reversal of 16813897 is 79831861.

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 16813897 - 2¹¹ = 16811849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16813837) 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, 13647 + ... + 14827.

It is an arithmetic number, because the mean of its divisors is an integer number (2198520).

Almost surely, 2^16813897 is an apocalyptic number.

It is an amenable number.

16813897 is a deficient number, since it is larger than the sum of its proper divisors (774263).

16813897 is a wasteful number, since it uses less digits than its factorization.

16813897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823.

The product of its digits is 72576, while the sum is 43.

The square root of 16813897 is about 4100.4752163621. The cubic root of 16813897 is about 256.1864334098.

The spelling of 16813897 in words is "sixteen million, eight hundred thirteen thousand, eight hundred ninety-seven".