810869133 has 4 divisors (see below), whose sum is σ = 1081158848. Its totient is φ = 540579420.

The previous prime is 810869131. The next prime is 810869153. The reversal of 810869133 is 331968018.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 810869133 - 2¹ = 810869131 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 810869091 and 810869100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810869131) 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 in 3 ways as a sum of consecutive naturals, for example, 135144853 + ... + 135144858.

It is an arithmetic number, because the mean of its divisors is an integer number (270289712).

Almost surely, 2^810869133 is an apocalyptic number.

It is an amenable number.

810869133 is a deficient number, since it is larger than the sum of its proper divisors (270289715).

810869133 is a wasteful number, since it uses less digits than its factorization.

810869133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270289714.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 810869133 is about 28475.7639581452. The cubic root of 810869133 is about 932.5030398069.

The spelling of 810869133 in words is "eight hundred ten million, eight hundred sixty-nine thousand, one hundred thirty-three".