188988313 has 6 divisors (see below), whose sum is σ = 191696334. Its totient is φ = 186283584.

The previous prime is 188988299. The next prime is 188988323. The reversal of 188988313 is 313889881.

It can be written as a sum of positive squares in 3 ways, for example, as 144192064 + 44796249 = 12008^2 + 6693^2 .

It is not a de Polignac number, because 188988313 - 2¹⁷ = 188857241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188988323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 116653 + ... + 118261.

It is an arithmetic number, because the mean of its divisors is an integer number (31949389).

Almost surely, 2^188988313 is an apocalyptic number.

It is an amenable number.

188988313 is a deficient number, since it is larger than the sum of its proper divisors (2708021).

188988313 is an frugal number, since it uses more digits than its factorization.

188988313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3291 (or 1682 counting only the distinct ones).

The product of its digits is 331776, while the sum is 49.

The square root of 188988313 is about 13747.3020262159. The cubic root of 188988313 is about 573.8675257907.

The spelling of 188988313 in words is "one hundred eighty-eight million, nine hundred eighty-eight thousand, three hundred thirteen".