30399947 has 2 divisors, whose sum is σ = 30399948. Its totient is φ = 30399946.

The previous prime is 30399937. The next prime is 30399973. The reversal of 30399947 is 74999303.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30399947 - 2⁶ = 30399883 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 30399898 and 30399907.

It is not a weakly prime, because it can be changed into another prime (30399937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15199973 + 15199974.

It is an arithmetic number, because the mean of its divisors is an integer number (15199974).

Almost surely, 2^30399947 is an apocalyptic number.

30399947 is a deficient number, since it is larger than the sum of its proper divisors (1).

30399947 is an equidigital number, since it uses as much as digits as its factorization.

30399947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 30399947 is about 5513.6146945538. The cubic root of 30399947 is about 312.0979687686.

The spelling of 30399947 in words is "thirty million, three hundred ninety-nine thousand, nine hundred forty-seven".