825330721 has 8 divisors (see below), whose sum is σ = 869650400. Its totient is φ = 781099200.

The previous prime is 825330713. The next prime is 825330733. The reversal of 825330721 is 127033528.

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 825330721 - 2³ = 825330713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (825330791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2355 + ... + 40696.

It is an arithmetic number, because the mean of its divisors is an integer number (108706300).

Almost surely, 2^825330721 is an apocalyptic number.

It is an amenable number.

825330721 is a deficient number, since it is larger than the sum of its proper divisors (44319679).

825330721 is a wasteful number, since it uses less digits than its factorization.

825330721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44079.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 825330721 is about 28728.5697694821. The cubic root of 825330721 is about 938.0140359903.

The spelling of 825330721 in words is "eight hundred twenty-five million, three hundred thirty thousand, seven hundred twenty-one".