16871938 has 4 divisors (see below), whose sum is σ = 25307910. Its totient is φ = 8435968.

The previous prime is 16871927. The next prime is 16871941. The reversal of 16871938 is 83917861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83917861 = 613 ⋅136897.

It can be written as a sum of positive squares in only one way, i.e., 16867449 + 4489 = 4107^2 + 67^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16871894 and 16871903.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4217983 + ... + 4217986.

Almost surely, 2^16871938 is an apocalyptic number.

16871938 is a deficient number, since it is larger than the sum of its proper divisors (8435972).

16871938 is an equidigital number, since it uses as much as digits as its factorization.

16871938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8435971.

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

The square root of 16871938 is about 4107.5464696093. The cubic root of 16871938 is about 256.4808771480.

The spelling of 16871938 in words is "sixteen million, eight hundred seventy-one thousand, nine hundred thirty-eight".