30239947 has 2 divisors, whose sum is σ = 30239948. Its totient is φ = 30239946.

The previous prime is 30239939. The next prime is 30239959. The reversal of 30239947 is 74993203.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30239947 - 2³ = 30239939 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30239977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15119973 + 15119974.

It is an arithmetic number, because the mean of its divisors is an integer number (15119974).

Almost surely, 2^30239947 is an apocalyptic number.

30239947 is a deficient number, since it is larger than the sum of its proper divisors (1).

30239947 is an equidigital number, since it uses as much as digits as its factorization.

30239947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 30239947 is about 5499.0860149665. The cubic root of 30239947 is about 311.5494640989.

The spelling of 30239947 in words is "thirty million, two hundred thirty-nine thousand, nine hundred forty-seven".