813018806 has 4 divisors (see below), whose sum is σ = 1219528212. Its totient is φ = 406509402.

The previous prime is 813018779. The next prime is 813018809. The reversal of 813018806 is 608810318.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 608810318 = 2 ⋅304405159.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813018809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203254700 + ... + 203254703.

It is an arithmetic number, because the mean of its divisors is an integer number (304882053).

Almost surely, 2^813018806 is an apocalyptic number.

813018806 is a deficient number, since it is larger than the sum of its proper divisors (406509406).

813018806 is a wasteful number, since it uses less digits than its factorization.

813018806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406509405.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 813018806 is about 28513.4846344673. The cubic root of 813018806 is about 933.3263571191.

The spelling of 813018806 in words is "eight hundred thirteen million, eighteen thousand, eight hundred six".