28459979 has 2 divisors, whose sum is σ = 28459980. Its totient is φ = 28459978.

The previous prime is 28459939. The next prime is 28460011. The reversal of 28459979 is 97995482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28459979 - 2⁸ = 28459723 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28459979.

It is not a weakly prime, because it can be changed into another prime (28459909) 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, 14229989 + 14229990.

It is an arithmetic number, because the mean of its divisors is an integer number (14229990).

Almost surely, 2^28459979 is an apocalyptic number.

28459979 is a deficient number, since it is larger than the sum of its proper divisors (1).

28459979 is an equidigital number, since it uses as much as digits as its factorization.

28459979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 53.

The square root of 28459979 is about 5334.7894991274. The cubic root of 28459979 is about 305.3126919436.

The spelling of 28459979 in words is "twenty-eight million, four hundred fifty-nine thousand, nine hundred seventy-nine".