818867273 has 6 divisors (see below), whose sum is σ = 952559946. Its totient is φ = 701886192.

The previous prime is 818867261. The next prime is 818867279. The reversal of 818867273 is 372768818.

818867273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 654950464 + 163916809 = 25592^2 + 12803^2 .

It is not a de Polignac number, because 818867273 - 2¹⁰ = 818866249 is a prime.

It is a super-2 number, since 2×818867273² = 1341087221580913058, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (818867279) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8355740 + ... + 8355837.

It is an arithmetic number, because the mean of its divisors is an integer number (158759991).

Almost surely, 2^818867273 is an apocalyptic number.

It is an amenable number.

818867273 is a deficient number, since it is larger than the sum of its proper divisors (133692673).

818867273 is a wasteful number, since it uses less digits than its factorization.

818867273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16711591 (or 16711584 counting only the distinct ones).

The product of its digits is 903168, while the sum is 50.

The square root of 818867273 is about 28615.8570201907. The cubic root of 818867273 is about 935.5589794315.

The spelling of 818867273 in words is "eight hundred eighteen million, eight hundred sixty-seven thousand, two hundred seventy-three".