809850133 has 2 divisors, whose sum is σ = 809850134. Its totient is φ = 809850132.

The previous prime is 809850127. The next prime is 809850179. The reversal of 809850133 is 331058908.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 809800849 + 49284 = 28457^2 + 222^2 .

It is a cyclic number.

It is not a de Polignac number, because 809850133 - 2¹³ = 809841941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 809850092 and 809850101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (809850103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404925066 + 404925067.

It is an arithmetic number, because the mean of its divisors is an integer number (404925067).

Almost surely, 2^809850133 is an apocalyptic number.

It is an amenable number.

809850133 is a deficient number, since it is larger than the sum of its proper divisors (1).

809850133 is an equidigital number, since it uses as much as digits as its factorization.

809850133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 809850133 is about 28457.8659249073. The cubic root of 809850133 is about 932.1122579174.

The spelling of 809850133 in words is "eight hundred nine million, eight hundred fifty thousand, one hundred thirty-three".