188493407139 has 8 divisors (see below), whose sum is σ = 254148414480. Its totient is φ = 124250335616.

The previous prime is 188493407077. The next prime is 188493407153. The reversal of 188493407139 is 931704394881.

It is a happy number.

188493407139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 188493407139 - 2⁸ = 188493406883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (188493407539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352983642 + ... + 352984175.

It is an arithmetic number, because the mean of its divisors is an integer number (31768551810).

Almost surely, 2^188493407139 is an apocalyptic number.

188493407139 is a deficient number, since it is larger than the sum of its proper divisors (65655007341).

188493407139 is an equidigital number, since it uses as much as digits as its factorization.

188493407139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705967909.

The product of its (nonzero) digits is 5225472, while the sum is 57.

The spelling of 188493407139 in words is "one hundred eighty-eight billion, four hundred ninety-three million, four hundred seven thousand, one hundred thirty-nine".