185329213 has 2 divisors, whose sum is σ = 185329214. Its totient is φ = 185329212.

The previous prime is 185329201. The next prime is 185329231. The reversal of 185329213 is 312923581.

Together with next prime (185329231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138721284 + 46607929 = 11778^2 + 6827^2 .

It is an emirp because it is prime and its reverse (312923581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 185329213 - 2²¹ = 183232061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (185329283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92664606 + 92664607.

It is an arithmetic number, because the mean of its divisors is an integer number (92664607).

Almost surely, 2^185329213 is an apocalyptic number.

It is an amenable number.

185329213 is a deficient number, since it is larger than the sum of its proper divisors (1).

185329213 is an equidigital number, since it uses as much as digits as its factorization.

185329213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 34.

The square root of 185329213 is about 13613.5672400734. The cubic root of 185329213 is about 570.1397143920.

The spelling of 185329213 in words is "one hundred eighty-five million, three hundred twenty-nine thousand, two hundred thirteen".