30000071 has 2 divisors, whose sum is σ = 30000072. Its totient is φ = 30000070.

The previous prime is 30000059. The next prime is 30000079. The reversal of 30000071 is 17000003.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30000071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30000079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15000035 + 15000036.

It is an arithmetic number, because the mean of its divisors is an integer number (15000036).

Almost surely, 2^30000071 is an apocalyptic number.

30000071 is a deficient number, since it is larger than the sum of its proper divisors (1).

30000071 is an equidigital number, since it uses as much as digits as its factorization.

30000071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21, while the sum is 11.

The square root of 30000071 is about 5477.2320564314. The cubic root of 30000071 is about 310.7234957213.

Adding to 30000071 its reverse (17000003), we get a palindrome (47000074).

The spelling of 30000071 in words is "thirty million, seventy-one", and thus it is an aban number and an uban number.