28517479 has 2 divisors, whose sum is σ = 28517480. Its totient is φ = 28517478.

The previous prime is 28517477. The next prime is 28517519. The reversal of 28517479 is 97471582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28517479 - 2¹ = 28517477 is a prime.

Together with 28517477, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28517477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14258739 + 14258740.

It is an arithmetic number, because the mean of its divisors is an integer number (14258740).

Almost surely, 2^28517479 is an apocalyptic number.

28517479 is a deficient number, since it is larger than the sum of its proper divisors (1).

28517479 is an equidigital number, since it uses as much as digits as its factorization.

28517479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 43.

The square root of 28517479 is about 5340.1759334314. The cubic root of 28517479 is about 305.5181696089.

The spelling of 28517479 in words is "twenty-eight million, five hundred seventeen thousand, four hundred seventy-nine".