30861087 has 4 divisors (see below), whose sum is σ = 41148120. Its totient is φ = 20574056.

The previous prime is 30861067. The next prime is 30861097. The reversal of 30861087 is 78016803.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30861087 - 2¹¹ = 30859039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30861007) 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 3 ways as a sum of consecutive naturals, for example, 5143512 + ... + 5143517.

It is an arithmetic number, because the mean of its divisors is an integer number (10287030).

Almost surely, 2^30861087 is an apocalyptic number.

30861087 is a deficient number, since it is larger than the sum of its proper divisors (10287033).

30861087 is a wasteful number, since it uses less digits than its factorization.

30861087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10287032.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 30861087 is about 5555.2756007241. The cubic root of 30861087 is about 313.6681383019.

The spelling of 30861087 in words is "thirty million, eight hundred sixty-one thousand, eighty-seven".