825520879 has 2 divisors, whose sum is σ = 825520880. Its totient is φ = 825520878.

The previous prime is 825520847. The next prime is 825520889. The reversal of 825520879 is 978025528.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 825520879 - 2⁵ = 825520847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (825520889) 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 as a sum of consecutive naturals, namely, 412760439 + 412760440.

It is an arithmetic number, because the mean of its divisors is an integer number (412760440).

Almost surely, 2^825520879 is an apocalyptic number.

825520879 is a deficient number, since it is larger than the sum of its proper divisors (1).

825520879 is an equidigital number, since it uses as much as digits as its factorization.

825520879 is an odious number, because the sum of its binary digits is odd.

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

The square root of 825520879 is about 28731.8791414693. The cubic root of 825520879 is about 938.0860706189.

The spelling of 825520879 in words is "eight hundred twenty-five million, five hundred twenty thousand, eight hundred seventy-nine".