825520897 has 2 divisors, whose sum is σ = 825520898. Its totient is φ = 825520896.

The previous prime is 825520889. The next prime is 825520903. The reversal of 825520897 is 798025528.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 817731216 + 7789681 = 28596^2 + 2791^2 .

It is a cyclic number.

It is not a de Polignac number, because 825520897 - 2³ = 825520889 is a prime.

It is not a weakly prime, because it can be changed into another prime (825520847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412760448 + 412760449.

It is an arithmetic number, because the mean of its divisors is an integer number (412760449).

Almost surely, 2^825520897 is an apocalyptic number.

It is an amenable number.

825520897 is a deficient number, since it is larger than the sum of its proper divisors (1).

825520897 is an equidigital number, since it uses as much as digits as its factorization.

825520897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403200, while the sum is 46.

The square root of 825520897 is about 28731.8794547102. The cubic root of 825520897 is about 938.0860774370.

The spelling of 825520897 in words is "eight hundred twenty-five million, five hundred twenty thousand, eight hundred ninety-seven".