16870217 has 16 divisors (see below), whose sum is σ = 21006720. Its totient is φ = 13191552.

The previous prime is 16870211. The next prime is 16870219. The reversal of 16870217 is 71207861.

It is a cyclic number.

It is not a de Polignac number, because 16870217 - 2⁶ = 16870153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16870211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7058 + ... + 9140.

It is an arithmetic number, because the mean of its divisors is an integer number (1312920).

Almost surely, 2^16870217 is an apocalyptic number.

It is an amenable number.

16870217 is a deficient number, since it is larger than the sum of its proper divisors (4136503).

16870217 is a wasteful number, since it uses less digits than its factorization.

16870217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 16870217 is about 4107.3369718103. The cubic root of 16870217 is about 256.4721561858.

The spelling of 16870217 in words is "sixteen million, eight hundred seventy thousand, two hundred seventeen".