30987688091 has 8 divisors (see below), whose sum is σ = 31152681744. Its totient is φ = 30822865920.

The previous prime is 30987688079. The next prime is 30987688097. The reversal of 30987688091 is 19088678903.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30987688091 - 2¹⁰ = 30987687067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30987688091.

It is not an unprimeable number, because it can be changed into a prime (30987688097) 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 7 ways as a sum of consecutive naturals, for example, 327995 + ... + 411771.

It is an arithmetic number, because the mean of its divisors is an integer number (3894085218).

Almost surely, 2^30987688091 is an apocalyptic number.

30987688091 is a deficient number, since it is larger than the sum of its proper divisors (164993653).

30987688091 is a wasteful number, since it uses less digits than its factorization.

30987688091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85741.

The product of its (nonzero) digits is 5225472, while the sum is 59.

The spelling of 30987688091 in words is "thirty billion, nine hundred eighty-seven million, six hundred eighty-eight thousand, ninety-one".