188764513 has 6 divisors (see below), whose sum is σ = 219583266. Its totient is φ = 161798112.

The previous prime is 188764501. The next prime is 188764517. The reversal of 188764513 is 315467881.

It can be written as a sum of positive squares in only one way, i.e., 122943744 + 65820769 = 11088^2 + 8113^2 .

It is not a de Polignac number, because 188764513 - 2⁹ = 188764001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 188764513.

It is not an unprimeable number, because it can be changed into a prime (188764517) 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, 1926120 + ... + 1926217.

It is an arithmetic number, because the mean of its divisors is an integer number (36597211).

Almost surely, 2^188764513 is an apocalyptic number.

It is an amenable number.

188764513 is a deficient number, since it is larger than the sum of its proper divisors (30818753).

188764513 is an equidigital number, since it uses as much as digits as its factorization.

188764513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3852351 (or 3852344 counting only the distinct ones).

The product of its digits is 161280, while the sum is 43.

The square root of 188764513 is about 13739.1598360307. The cubic root of 188764513 is about 573.6409116334.

The spelling of 188764513 in words is "one hundred eighty-eight million, seven hundred sixty-four thousand, five hundred thirteen".