825454009 has 4 divisors (see below), whose sum is σ = 825511540. Its totient is φ = 825396480.

The previous prime is 825454001. The next prime is 825454093. The reversal of 825454009 is 900454528.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 489648384 + 335805625 = 22128^2 + 18325^2 .

It is a cyclic number.

It is not a de Polignac number, because 825454009 - 2³ = 825454001 is a prime.

It is a super-3 number, since 3×825454009³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (825454001) 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, 12277 + ... + 42445.

It is an arithmetic number, because the mean of its divisors is an integer number (206377885).

Almost surely, 2^825454009 is an apocalyptic number.

It is an amenable number.

825454009 is a deficient number, since it is larger than the sum of its proper divisors (57531).

825454009 is a wasteful number, since it uses less digits than its factorization.

825454009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57530.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 825454009 is about 28730.7154279179. The cubic root of 825454009 is about 938.0607405471.

The spelling of 825454009 in words is "eight hundred twenty-five million, four hundred fifty-four thousand, nine".