30000978979 has 2 divisors, whose sum is σ = 30000978980. Its totient is φ = 30000978978.

The previous prime is 30000978937. The next prime is 30000979031. The reversal of 30000978979 is 97987900003.

It is an a-pointer prime, because the next prime (30000979031) can be obtained adding 30000978979 to its sum of digits (52).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30000978979 - 2⁷ = 30000978851 is a prime.

It is not a weakly prime, because it can be changed into another prime (30000978379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15000489489 + 15000489490.

It is an arithmetic number, because the mean of its divisors is an integer number (15000489490).

Almost surely, 2^30000978979 is an apocalyptic number.

30000978979 is a deficient number, since it is larger than the sum of its proper divisors (1).

30000978979 is an equidigital number, since it uses as much as digits as its factorization.

30000978979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 52.

The spelling of 30000978979 in words is "thirty billion, nine hundred seventy-eight thousand, nine hundred seventy-nine".