188935213 has 6 divisors (see below), whose sum is σ = 190312106. Its totient is φ = 187560672.

The previous prime is 188935211. The next prime is 188935217. The reversal of 188935213 is 312539881.

188935213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 751689 + 188183524 = 867^2 + 13718^2 .

It is not a de Polignac number, because 188935213 - 2¹ = 188935211 is a prime.

It is a super-2 number, since 2×188935213² = 71393029422710738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188935211) 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, 171681 + ... + 172777.

Almost surely, 2^188935213 is an apocalyptic number.

It is an amenable number.

188935213 is a deficient number, since it is larger than the sum of its proper divisors (1376893).

188935213 is an frugal number, since it uses more digits than its factorization.

188935213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2351 (or 1254 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 188935213 is about 13745.3706024974. The cubic root of 188935213 is about 573.8137742835.

The spelling of 188935213 in words is "one hundred eighty-eight million, nine hundred thirty-five thousand, two hundred thirteen".