30000247 has 2 divisors, whose sum is σ = 30000248. Its totient is φ = 30000246.

The previous prime is 30000199. The next prime is 30000251. The reversal of 30000247 is 74200003.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30000247 is a prime.

It is a super-2 number, since 2×30000247² = 1800029640122018, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30000247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30000277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15000123 + 15000124.

It is an arithmetic number, because the mean of its divisors is an integer number (15000124).

Almost surely, 2^30000247 is an apocalyptic number.

30000247 is a deficient number, since it is larger than the sum of its proper divisors (1).

30000247 is an equidigital number, since it uses as much as digits as its factorization.

30000247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 30000247 is about 5477.2481229172. The cubic root of 30000247 is about 310.7241033557.

The spelling of 30000247 in words is "thirty million, two hundred forty-seven", and thus it is an aban number.