30888113 has 4 divisors (see below), whose sum is σ = 30901620. Its totient is φ = 30874608.

The previous prime is 30888083. The next prime is 30888127. The reversal of 30888113 is 31188803.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31188803 = 43 ⋅725321.

It can be written as a sum of positive squares in 2 ways, for example, as 20539024 + 10349089 = 4532^2 + 3217^2 .

It is a cyclic number.

It is not a de Polignac number, because 30888113 - 2¹² = 30884017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30888113.

It is not an unprimeable number, because it can be changed into a prime (30888413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2378 + ... + 8211.

It is an arithmetic number, because the mean of its divisors is an integer number (7725405).

Almost surely, 2^30888113 is an apocalyptic number.

It is an amenable number.

30888113 is a deficient number, since it is larger than the sum of its proper divisors (13507).

30888113 is a wasteful number, since it uses less digits than its factorization.

30888113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13506.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 30888113 is about 5557.7075309879. The cubic root of 30888113 is about 313.7596745217.

The spelling of 30888113 in words is "thirty million, eight hundred eighty-eight thousand, one hundred thirteen".