186340249 has 2 divisors, whose sum is σ = 186340250. Its totient is φ = 186340248.

The previous prime is 186340241. The next prime is 186340267. The reversal of 186340249 is 942043681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160655625 + 25684624 = 12675^2 + 5068^2 .

It is an emirp because it is prime and its reverse (942043681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 186340249 - 2³ = 186340241 is a prime.

It is not a weakly prime, because it can be changed into another prime (186340241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93170124 + 93170125.

It is an arithmetic number, because the mean of its divisors is an integer number (93170125).

Almost surely, 2^186340249 is an apocalyptic number.

It is an amenable number.

186340249 is a deficient number, since it is larger than the sum of its proper divisors (1).

186340249 is an equidigital number, since it uses as much as digits as its factorization.

186340249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 186340249 is about 13650.6501310377. The cubic root of 186340249 is about 571.1746056173.

The spelling of 186340249 in words is "one hundred eighty-six million, three hundred forty thousand, two hundred forty-nine".