218762849 has 2 divisors, whose sum is σ = 218762850. Its totient is φ = 218762848.

The previous prime is 218762837. The next prime is 218762893. The reversal of 218762849 is 948267812.

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., 188567824 + 30195025 = 13732^2 + 5495^2 .

It is a cyclic number.

It is not a de Polignac number, because 218762849 - 2²⁴ = 201985633 is a prime.

It is not a weakly prime, because it can be changed into another prime (218762809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109381424 + 109381425.

It is an arithmetic number, because the mean of its divisors is an integer number (109381425).

Almost surely, 2^218762849 is an apocalyptic number.

It is an amenable number.

218762849 is a deficient number, since it is larger than the sum of its proper divisors (1).

218762849 is an equidigital number, since it uses as much as digits as its factorization.

218762849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 47.

The square root of 218762849 is about 14790.6338268514. The cubic root of 218762849 is about 602.5473631149.

The spelling of 218762849 in words is "two hundred eighteen million, seven hundred sixty-two thousand, eight hundred forty-nine".