30120047 has 2 divisors, whose sum is σ = 30120048. Its totient is φ = 30120046.

The previous prime is 30120023. The next prime is 30120061. The reversal of 30120047 is 74002103.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30120047 - 2¹⁴ = 30103663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30120017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15060023 + 15060024.

It is an arithmetic number, because the mean of its divisors is an integer number (15060024).

Almost surely, 2^30120047 is an apocalyptic number.

30120047 is a deficient number, since it is larger than the sum of its proper divisors (1).

30120047 is an equidigital number, since it uses as much as digits as its factorization.

30120047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 30120047 is about 5488.1733755413. The cubic root of 30120047 is about 311.1371589255.

The spelling of 30120047 in words is "thirty million, one hundred twenty thousand, forty-seven".