188008013 has 4 divisors (see below), whose sum is σ = 191555388. Its totient is φ = 184460640.

The previous prime is 188007991. The next prime is 188008057. The reversal of 188008013 is 310800881.

It is a happy number.

188008013 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.

It can be written as a sum of positive squares in 2 ways, for example, as 67601284 + 120406729 = 8222^2 + 10973^2 .

It is a cyclic number.

It is not a de Polignac number, because 188008013 - 2¹⁶ = 187942477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188008813) 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, 1773608 + ... + 1773713.

It is an arithmetic number, because the mean of its divisors is an integer number (47888847).

Almost surely, 2^188008013 is an apocalyptic number.

It is an amenable number.

188008013 is a deficient number, since it is larger than the sum of its proper divisors (3547375).

188008013 is an equidigital number, since it uses as much as digits as its factorization.

188008013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3547374.

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 188008013 is about 13711.6014017328. The cubic root of 188008013 is about 572.8735704378.

Adding to 188008013 its reverse (310800881), we get a palindrome (498808894).

The spelling of 188008013 in words is "one hundred eighty-eight million, eight thousand, thirteen".