825733009 has 4 divisors (see below), whose sum is σ = 829339060. Its totient is φ = 822126960.

The previous prime is 825732983. The next prime is 825733021. The reversal of 825733009 is 900337528.

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 650250000 + 175483009 = 25500^2 + 13247^2 .

It is a cyclic number.

It is not a de Polignac number, because 825733009 - 2⁵ = 825732977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (825733049) 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 in 3 ways as a sum of consecutive naturals, for example, 1802682 + ... + 1803139.

It is an arithmetic number, because the mean of its divisors is an integer number (207334765).

Almost surely, 2^825733009 is an apocalyptic number.

It is an amenable number.

825733009 is a deficient number, since it is larger than the sum of its proper divisors (3606051).

825733009 is a wasteful number, since it uses less digits than its factorization.

825733009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3606050.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 825733009 is about 28735.5704484877. The cubic root of 825733009 is about 938.1664155101.

The spelling of 825733009 in words is "eight hundred twenty-five million, seven hundred thirty-three thousand, nine".