16870939 has 4 divisors (see below), whose sum is σ = 17038080. Its totient is φ = 16703800.

The previous prime is 16870933. The next prime is 16870943. The reversal of 16870939 is 93907861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93907861 = 19 ⋅4942519.

It is a cyclic number.

It is not a de Polignac number, because 16870939 - 2¹⁹ = 16346651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16870895 and 16870904.

It is not an unprimeable number, because it can be changed into a prime (16870933) 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, 83419 + ... + 83620.

It is an arithmetic number, because the mean of its divisors is an integer number (4259520).

Almost surely, 2^16870939 is an apocalyptic number.

16870939 is a deficient number, since it is larger than the sum of its proper divisors (167141).

16870939 is a wasteful number, since it uses less digits than its factorization.

16870939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167140.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 16870939 is about 4107.4248623681. The cubic root of 16870939 is about 256.4758149069.

The spelling of 16870939 in words is "sixteen million, eight hundred seventy thousand, nine hundred thirty-nine".