188328013 has 4 divisors (see below), whose sum is σ = 192335040. Its totient is φ = 184320988.

The previous prime is 188328011. The next prime is 188328029. The reversal of 188328013 is 310823881.

188328013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 188328013 - 2¹ = 188328011 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 188328013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188328011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2003443 + ... + 2003536.

It is an arithmetic number, because the mean of its divisors is an integer number (48083760).

Almost surely, 2^188328013 is an apocalyptic number.

It is an amenable number.

188328013 is a deficient number, since it is larger than the sum of its proper divisors (4007027).

188328013 is an equidigital number, since it uses as much as digits as its factorization.

188328013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4007026.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 188328013 is about 13723.2653912981. The cubic root of 188328013 is about 573.1984070076.

The spelling of 188328013 in words is "one hundred eighty-eight million, three hundred twenty-eight thousand, thirteen".