818867249 has 4 divisors (see below), whose sum is σ = 818998260. Its totient is φ = 818736240.

The previous prime is 818867243. The next prime is 818867251. The reversal of 818867249 is 942768818.

It is a happy number.

818867249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 92025649 + 726841600 = 9593^2 + 26960^2 .

It is a cyclic number.

It is not a de Polignac number, because 818867249 - 2²⁸ = 550431793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 818867249.

It is not an unprimeable number, because it can be changed into a prime (818867243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55634 + ... + 68795.

It is an arithmetic number, because the mean of its divisors is an integer number (204749565).

Almost surely, 2^818867249 is an apocalyptic number.

It is an amenable number.

818867249 is a deficient number, since it is larger than the sum of its proper divisors (131011).

818867249 is a wasteful number, since it uses less digits than its factorization.

818867249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131010.

The product of its digits is 1548288, while the sum is 53.

The square root of 818867249 is about 28615.8566008428. The cubic root of 818867249 is about 935.5589702915.

The spelling of 818867249 in words is "eight hundred eighteen million, eight hundred sixty-seven thousand, two hundred forty-nine".