186745213 has 2 divisors, whose sum is σ = 186745214. Its totient is φ = 186745212.

The previous prime is 186745199. The next prime is 186745219. The reversal of 186745213 is 312547681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99640324 + 87104889 = 9982^2 + 9333^2 .

It is a cyclic number.

It is not a de Polignac number, because 186745213 - 2¹³ = 186737021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (186745219) by changing a digit.

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 as a sum of consecutive naturals, namely, 93372606 + 93372607.

It is an arithmetic number, because the mean of its divisors is an integer number (93372607).

Almost surely, 2^186745213 is an apocalyptic number.

It is an amenable number.

186745213 is a deficient number, since it is larger than the sum of its proper divisors (1).

186745213 is an equidigital number, since it uses as much as digits as its factorization.

186745213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 37.

The square root of 186745213 is about 13665.4752204232. The cubic root of 186745213 is about 571.5880746968.

The spelling of 186745213 in words is "one hundred eighty-six million, seven hundred forty-five thousand, two hundred thirteen".