810826105 has 4 divisors (see below), whose sum is σ = 972991332. Its totient is φ = 648660880.

The previous prime is 810826099. The next prime is 810826123. The reversal of 810826105 is 501628018.

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

It can be written as a sum of positive squares in 2 ways, for example, as 125014761 + 685811344 = 11181^2 + 26188^2 .

It is not a de Polignac number, because 810826105 - 2⁵ = 810826073 is a prime.

It is a super-3 number, since 3×810826105³ (a number of 28 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81082606 + ... + 81082615.

It is an arithmetic number, because the mean of its divisors is an integer number (243247833).

Almost surely, 2^810826105 is an apocalyptic number.

It is an amenable number.

810826105 is a deficient number, since it is larger than the sum of its proper divisors (162165227).

810826105 is a wasteful number, since it uses less digits than its factorization.

810826105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162165226.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 810826105 is about 28475.0084284448. The cubic root of 810826105 is about 932.4865453859.

The spelling of 810826105 in words is "eight hundred ten million, eight hundred twenty-six thousand, one hundred five".