825349009 has 8 divisors (see below), whose sum is σ = 848973312. Its totient is φ = 801926160.

The previous prime is 825349003. The next prime is 825349039. The reversal of 825349009 is 900943528.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 825349009 - 2³ = 825349001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (825349001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42034 + ... + 58459.

It is an arithmetic number, because the mean of its divisors is an integer number (106121664).

Almost surely, 2^825349009 is an apocalyptic number.

It is an amenable number.

825349009 is a deficient number, since it is larger than the sum of its proper divisors (23624303).

825349009 is a wasteful number, since it uses less digits than its factorization.

825349009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100727.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 825349009 is about 28728.8880571455. Note that the first 3 decimals coincide. The cubic root of 825349009 is about 938.0209642328.

The spelling of 825349009 in words is "eight hundred twenty-five million, three hundred forty-nine thousand, nine".