825789947 has 4 divisors (see below), whose sum is σ = 825874896. Its totient is φ = 825705000.

The previous prime is 825789929. The next prime is 825789959. The reversal of 825789947 is 749987528.

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 is a cyclic number.

It is not a de Polignac number, because 825789947 - 2⁶ = 825789883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (825789967) 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, 25679 + ... + 48072.

It is an arithmetic number, because the mean of its divisors is an integer number (206468724).

Almost surely, 2^825789947 is an apocalyptic number.

825789947 is a deficient number, since it is larger than the sum of its proper divisors (84949).

825789947 is a wasteful number, since it uses less digits than its factorization.

825789947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84948.

The product of its digits is 10160640, while the sum is 59.

The square root of 825789947 is about 28736.5611547381. The cubic root of 825789947 is about 938.1879786106.

The spelling of 825789947 in words is "eight hundred twenty-five million, seven hundred eighty-nine thousand, nine hundred forty-seven".