30661047 has 24 divisors (see below), whose sum is σ = 48937824. Its totient is φ = 18399744.

The previous prime is 30661031. The next prime is 30661051. The reversal of 30661047 is 74016603.

30661047 is a `hidden beast` number, since 3 + 0 + 6 + 610 + 47 = 666.

It is not a de Polignac number, because 30661047 - 2⁴ = 30661031 is a prime.

It is a super-3 number, since 3×30661047³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30661047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30661027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 838 + ... + 7875.

It is an arithmetic number, because the mean of its divisors is an integer number (2039076).

Almost surely, 2^30661047 is an apocalyptic number.

30661047 is a deficient number, since it is larger than the sum of its proper divisors (18276777).

30661047 is a wasteful number, since it uses less digits than its factorization.

30661047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8759 (or 8756 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 30661047 is about 5537.2418224239. The cubic root of 30661047 is about 312.9889416896.

The spelling of 30661047 in words is "thirty million, six hundred sixty-one thousand, forty-seven".