818056906 has 4 divisors (see below), whose sum is σ = 1227085362. Its totient is φ = 409028452.

The previous prime is 818056903. The next prime is 818056919. The reversal of 818056906 is 609650818.

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., 801173025 + 16883881 = 28305^2 + 4109^2 .

It is not an unprimeable number, because it can be changed into a prime (818056903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204514225 + ... + 204514228.

Almost surely, 2^818056906 is an apocalyptic number.

818056906 is a deficient number, since it is larger than the sum of its proper divisors (409028456).

818056906 is a wasteful number, since it uses less digits than its factorization.

818056906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409028455.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 818056906 is about 28601.6941106641. The cubic root of 818056906 is about 935.2502617764.

The spelling of 818056906 in words is "eight hundred eighteen million, fifty-six thousand, nine hundred six".