188701213 has 2 divisors, whose sum is σ = 188701214. Its totient is φ = 188701212.

The previous prime is 188701211. The next prime is 188701327. The reversal of 188701213 is 312107881.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110944089 + 77757124 = 10533^2 + 8818^2 .

It is a cyclic number.

It is not a de Polignac number, because 188701213 - 2¹ = 188701211 is a prime.

Together with 188701211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188701211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94350606 + 94350607.

It is an arithmetic number, because the mean of its divisors is an integer number (94350607).

Almost surely, 2^188701213 is an apocalyptic number.

It is an amenable number.

188701213 is a deficient number, since it is larger than the sum of its proper divisors (1).

188701213 is an equidigital number, since it uses as much as digits as its factorization.

188701213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 188701213 is about 13736.8560085632. The cubic root of 188701213 is about 573.5767831791.

The spelling of 188701213 in words is "one hundred eighty-eight million, seven hundred one thousand, two hundred thirteen".