30019999979 has 2 divisors, whose sum is σ = 30019999980. Its totient is φ = 30019999978.

The previous prime is 30019999973. The next prime is 30020000011. The reversal of 30019999979 is 97999991003.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30019999979 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (30019999973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15009999989 + 15009999990.

It is an arithmetic number, because the mean of its divisors is an integer number (15009999990).

Almost surely, 2^30019999979 is an apocalyptic number.

30019999979 is a deficient number, since it is larger than the sum of its proper divisors (1).

30019999979 is an equidigital number, since it uses as much as digits as its factorization.

30019999979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11160261, while the sum is 65.

The spelling of 30019999979 in words is "thirty billion, nineteen million, nine hundred ninety-nine thousand, nine hundred seventy-nine".