306120047 has 2 divisors, whose sum is σ = 306120048. Its totient is φ = 306120046.

The previous prime is 306120011. The next prime is 306120091. The reversal of 306120047 is 740021603.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-306120047 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (306120097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153060023 + 153060024.

It is an arithmetic number, because the mean of its divisors is an integer number (153060024).

Almost surely, 2^306120047 is an apocalyptic number.

306120047 is a deficient number, since it is larger than the sum of its proper divisors (1).

306120047 is an equidigital number, since it uses as much as digits as its factorization.

306120047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 306120047 is about 17496.2866631751. The cubic root of 306120047 is about 673.9545201726.

The spelling of 306120047 in words is "three hundred six million, one hundred twenty thousand, forty-seven".