30643047 has 12 divisors (see below), whose sum is σ = 45292104. Its totient is φ = 19953360.

The previous prime is 30643037. The next prime is 30643057. The reversal of 30643047 is 74034603.

It is an interprime number because it is at equal distance from previous prime (30643037) and next prime (30643057).

It is not a de Polignac number, because 30643047 - 2⁸ = 30642791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30643047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30643037) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39204 + ... + 39977.

It is an arithmetic number, because the mean of its divisors is an integer number (3774342).

Almost surely, 2^30643047 is an apocalyptic number.

30643047 is a deficient number, since it is larger than the sum of its proper divisors (14649057).

30643047 is a wasteful number, since it uses less digits than its factorization.

30643047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79230 (or 79227 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

The square root of 30643047 is about 5535.6162258596. The cubic root of 30643047 is about 312.9276815096.

The spelling of 30643047 in words is "thirty million, six hundred forty-three thousand, forty-seven".