28716971 has 2 divisors, whose sum is σ = 28716972. Its totient is φ = 28716970.

The previous prime is 28716913. The next prime is 28716977. The reversal of 28716971 is 17961782.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28716971 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28716977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14358485 + 14358486.

It is an arithmetic number, because the mean of its divisors is an integer number (14358486).

Almost surely, 2^28716971 is an apocalyptic number.

28716971 is a deficient number, since it is larger than the sum of its proper divisors (1).

28716971 is an equidigital number, since it uses as much as digits as its factorization.

28716971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 41.

The square root of 28716971 is about 5358.8217921480. The cubic root of 28716971 is about 306.2289250526.

The spelling of 28716971 in words is "twenty-eight million, seven hundred sixteen thousand, nine hundred seventy-one".