30028979 has 2 divisors, whose sum is σ = 30028980. Its totient is φ = 30028978.

The previous prime is 30028967. The next prime is 30029009. The reversal of 30028979 is 97982003.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30028979 - 2⁴ = 30028963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30028939) 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, 15014489 + 15014490.

It is an arithmetic number, because the mean of its divisors is an integer number (15014490).

Almost surely, 2^30028979 is an apocalyptic number.

30028979 is a deficient number, since it is larger than the sum of its proper divisors (1).

30028979 is an equidigital number, since it uses as much as digits as its factorization.

30028979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 30028979 is about 5479.8703451815. The cubic root of 30028979 is about 310.8232678321.

The spelling of 30028979 in words is "thirty million, twenty-eight thousand, nine hundred seventy-nine".