386816849 has 2 divisors, whose sum is σ = 386816850. Its totient is φ = 386816848.

The previous prime is 386816831. The next prime is 386816893. The reversal of 386816849 is 948618683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 353176849 + 33640000 = 18793^2 + 5800^2 .

It is a cyclic number.

It is not a de Polignac number, because 386816849 - 2¹² = 386812753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 386816849.

It is not a weakly prime, because it can be changed into another prime (386896849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193408424 + 193408425.

It is an arithmetic number, because the mean of its divisors is an integer number (193408425).

Almost surely, 2^386816849 is an apocalyptic number.

It is an amenable number.

386816849 is a deficient number, since it is larger than the sum of its proper divisors (1).

386816849 is an equidigital number, since it uses as much as digits as its factorization.

386816849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1990656, while the sum is 53.

The square root of 386816849 is about 19667.6599777401. The cubic root of 386816849 is about 728.6211848024.

The spelling of 386816849 in words is "three hundred eighty-six million, eight hundred sixteen thousand, eight hundred forty-nine".