818814922 has 4 divisors (see below), whose sum is σ = 1228222386. Its totient is φ = 409407460.

The previous prime is 818814889. The next prime is 818814923. The reversal of 818814922 is 229418818.

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

It can be written as a sum of positive squares in only one way, i.e., 644601321 + 174213601 = 25389^2 + 13199^2 .

It is not an unprimeable number, because it can be changed into a prime (818814923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204703729 + ... + 204703732.

Almost surely, 2^818814922 is an apocalyptic number.

818814922 is a deficient number, since it is larger than the sum of its proper divisors (409407464).

818814922 is a wasteful number, since it uses less digits than its factorization.

818814922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409407463.

The product of its digits is 73728, while the sum is 43.

The square root of 818814922 is about 28614.9422854564. The cubic root of 818814922 is about 935.5390419343.

The spelling of 818814922 in words is "eight hundred eighteen million, eight hundred fourteen thousand, nine hundred twenty-two".