188013065 has 4 divisors (see below), whose sum is σ = 225615684. Its totient is φ = 150410448.

The previous prime is 188013053. The next prime is 188013103. The reversal of 188013065 is 560310881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75568249 + 112444816 = 8693^2 + 10604^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188013065 is a prime.

It is a super-2 number, since 2×188013065² = 70697825221388450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18801302 + ... + 18801311.

It is an arithmetic number, because the mean of its divisors is an integer number (56403921).

Almost surely, 2^188013065 is an apocalyptic number.

It is an amenable number.

188013065 is a deficient number, since it is larger than the sum of its proper divisors (37602619).

188013065 is an equidigital number, since it uses as much as digits as its factorization.

188013065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37602618.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 188013065 is about 13711.7856240535. The cubic root of 188013065 is about 572.8787016576.

The spelling of 188013065 in words is "one hundred eighty-eight million, thirteen thousand, sixty-five".