188481613 has 4 divisors (see below), whose sum is σ = 188509600. Its totient is φ = 188453628.

The previous prime is 188481569. The next prime is 188481617. The reversal of 188481613 is 316184881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 188481613 - 2¹⁷ = 188350541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188481617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2938 + ... + 19636.

It is an arithmetic number, because the mean of its divisors is an integer number (47127400).

Almost surely, 2^188481613 is an apocalyptic number.

It is an amenable number.

188481613 is a deficient number, since it is larger than the sum of its proper divisors (27987).

188481613 is a wasteful number, since it uses less digits than its factorization.

188481613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27986.

The product of its digits is 36864, while the sum is 40.

The square root of 188481613 is about 13728.8605863706. The cubic root of 188481613 is about 573.3541978691.

The spelling of 188481613 in words is "one hundred eighty-eight million, four hundred eighty-one thousand, six hundred thirteen".