818972229 has 32 divisors (see below), whose sum is σ = 1196937216. Its totient is φ = 495855360.

The previous prime is 818972221. The next prime is 818972233. The reversal of 818972229 is 922279818.

It is not a de Polignac number, because 818972229 - 2³ = 818972221 is a prime.

It is a super-3 number, since 3×818972229³ (a number of 28 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818972221) 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 in 31 ways as a sum of consecutive naturals, for example, 864334 + ... + 865280.

It is an arithmetic number, because the mean of its divisors is an integer number (37404288).

Almost surely, 2^818972229 is an apocalyptic number.

It is an amenable number.

818972229 is a deficient number, since it is larger than the sum of its proper divisors (377964987).

818972229 is a wasteful number, since it uses less digits than its factorization.

818972229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545.

The product of its digits is 290304, while the sum is 48.

The square root of 818972229 is about 28617.6908397585. The cubic root of 818972229 is about 935.5989486006.

The spelling of 818972229 in words is "eight hundred eighteen million, nine hundred seventy-two thousand, two hundred twenty-nine".