825980447 has 4 divisors (see below), whose sum is σ = 826730400. Its totient is φ = 825230496.

The previous prime is 825980423. The next prime is 825980453. The reversal of 825980447 is 744089528.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 825980447 - 2⁸ = 825980191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825980747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373322 + ... + 375527.

It is an arithmetic number, because the mean of its divisors is an integer number (206682600).

Almost surely, 2^825980447 is an apocalyptic number.

825980447 is a deficient number, since it is larger than the sum of its proper divisors (749953).

825980447 is a wasteful number, since it uses less digits than its factorization.

825980447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749952.

The product of its (nonzero) digits is 645120, while the sum is 47.

The square root of 825980447 is about 28739.8755564460. The cubic root of 825980447 is about 938.2601160305.

The spelling of 825980447 in words is "eight hundred twenty-five million, nine hundred eighty thousand, four hundred forty-seven".