16878887 has 2 divisors, whose sum is σ = 16878888. Its totient is φ = 16878886.

The previous prime is 16878881. The next prime is 16878889. The reversal of 16878887 is 78887861.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16878887 - 2¹⁰ = 16877863 is a prime.

Together with 16878889, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16878881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8439443 + 8439444.

It is an arithmetic number, because the mean of its divisors is an integer number (8439444).

Almost surely, 2^16878887 is an apocalyptic number.

16878887 is a deficient number, since it is larger than the sum of its proper divisors (1).

16878887 is an equidigital number, since it uses as much as digits as its factorization.

16878887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1204224, while the sum is 53.

The square root of 16878887 is about 4108.3922646213. The cubic root of 16878887 is about 256.5160843459.

The spelling of 16878887 in words is "sixteen million, eight hundred seventy-eight thousand, eight hundred eighty-seven".