16878871 has 4 divisors (see below), whose sum is σ = 16889544. Its totient is φ = 16868200.

The previous prime is 16878863. The next prime is 16878881. The reversal of 16878871 is 17887861.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 17887861 = 67 ⋅266983.

It is a cyclic number.

It is not a de Polignac number, because 16878871 - 2³ = 16878863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16878881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2440 + ... + 6301.

It is an arithmetic number, because the mean of its divisors is an integer number (4222386).

Almost surely, 2^16878871 is an apocalyptic number.

16878871 is a deficient number, since it is larger than the sum of its proper divisors (10673).

16878871 is an equidigital number, since it uses as much as digits as its factorization.

16878871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10672.

The product of its digits is 150528, while the sum is 46.

The square root of 16878871 is about 4108.3903173871. The cubic root of 16878871 is about 256.5160032928.

The spelling of 16878871 in words is "sixteen million, eight hundred seventy-eight thousand, eight hundred seventy-one".