28979539 has 2 divisors, whose sum is σ = 28979540. Its totient is φ = 28979538.

The previous prime is 28979537. The next prime is 28979551. The reversal of 28979539 is 93597982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28979539 - 2¹ = 28979537 is a prime.

It is a super-3 number, since 3×28979539³ (a number of 23 digits) contains 333 as substring.

Together with 28979537, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28979537) 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, 14489769 + 14489770.

It is an arithmetic number, because the mean of its divisors is an integer number (14489770).

Almost surely, 2^28979539 is an apocalyptic number.

28979539 is a deficient number, since it is larger than the sum of its proper divisors (1).

28979539 is an equidigital number, since it uses as much as digits as its factorization.

28979539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 52.

The square root of 28979539 is about 5383.2647157650. The cubic root of 28979539 is about 307.1594096207.

The spelling of 28979539 in words is "twenty-eight million, nine hundred seventy-nine thousand, five hundred thirty-nine".