16878947 has 2 divisors, whose sum is σ = 16878948. Its totient is φ = 16878946.

The previous prime is 16878889. The next prime is 16878959. The reversal of 16878947 is 74987861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16878947 - 2⁸ = 16878691 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 16878895 and 16878904.

It is not a weakly prime, because it can be changed into another prime (16878047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8439473 + 8439474.

It is an arithmetic number, because the mean of its divisors is an integer number (8439474).

Almost surely, 2^16878947 is an apocalyptic number.

16878947 is a deficient number, since it is larger than the sum of its proper divisors (1).

16878947 is an equidigital number, since it uses as much as digits as its factorization.

16878947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 50.

The square root of 16878947 is about 4108.3995667413. The cubic root of 16878947 is about 256.5163882946.

The spelling of 16878947 in words is "sixteen million, eight hundred seventy-eight thousand, nine hundred forty-seven".