825520847 has 2 divisors, whose sum is σ = 825520848. Its totient is φ = 825520846.

The previous prime is 825520823. The next prime is 825520879. The reversal of 825520847 is 748025528.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 825520847 - 2⁶ = 825520783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (825520897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412760423 + 412760424.

It is an arithmetic number, because the mean of its divisors is an integer number (412760424).

Almost surely, 2^825520847 is an apocalyptic number.

825520847 is a deficient number, since it is larger than the sum of its proper divisors (1).

825520847 is an equidigital number, since it uses as much as digits as its factorization.

825520847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 179200, while the sum is 41.

The square root of 825520847 is about 28731.8785845966. The cubic root of 825520847 is about 938.0860584978.

The spelling of 825520847 in words is "eight hundred twenty-five million, five hundred twenty thousand, eight hundred forty-seven".