812285099 has 4 divisors (see below), whose sum is σ = 840294960. Its totient is φ = 784275240.

The previous prime is 812285077. The next prime is 812285129. The reversal of 812285099 is 990582218.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 990582218 = 2 ⋅495291109.

It is a cyclic number.

It is not a de Polignac number, because 812285099 - 2²⁴ = 795507883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (812285029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14004887 + ... + 14004944.

It is an arithmetic number, because the mean of its divisors is an integer number (210073740).

Almost surely, 2^812285099 is an apocalyptic number.

812285099 is a deficient number, since it is larger than the sum of its proper divisors (28009861).

812285099 is a wasteful number, since it uses less digits than its factorization.

812285099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28009860.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 812285099 is about 28500.6157652778. The cubic root of 812285099 is about 933.0455131931.

The spelling of 812285099 in words is "eight hundred twelve million, two hundred eighty-five thousand, ninety-nine".