16897331 has 4 divisors (see below), whose sum is σ = 18433464. Its totient is φ = 15361200.

The previous prime is 16897313. The next prime is 16897339. The reversal of 16897331 is 13379861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13379861 = 11 ⋅1216351.

It is a cyclic number.

It is not a de Polignac number, because 16897331 - 2⁶ = 16897267 is a prime.

It is a super-2 number, since 2×16897331² = 571039589847122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16897339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 768050 + ... + 768071.

It is an arithmetic number, because the mean of its divisors is an integer number (4608366).

Almost surely, 2^16897331 is an apocalyptic number.

16897331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16897331 is a deficient number, since it is larger than the sum of its proper divisors (1536133).

16897331 is a wasteful number, since it uses less digits than its factorization.

16897331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536132.

The product of its digits is 27216, while the sum is 38.

The square root of 16897331 is about 4110.6363254367. The cubic root of 16897331 is about 256.6094842723.

The spelling of 16897331 in words is "sixteen million, eight hundred ninety-seven thousand, three hundred thirty-one".