825779 has 2 divisors, whose sum is σ = 825780. Its totient is φ = 825778.

The previous prime is 825763. The next prime is 825791. The reversal of 825779 is 977528.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 825779 - 2⁴ = 825763 is a prime.

It is not a weakly prime, because it can be changed into another prime (825709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412889 + 412890.

It is an arithmetic number, because the mean of its divisors is an integer number (412890).

2⁸²⁵⁷⁷⁹ is an apocalyptic number.

825779 is a deficient number, since it is larger than the sum of its proper divisors (1).

825779 is an equidigital number, since it uses as much as digits as its factorization.

825779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 38.

The square root of 825779 is about 908.7238304347. The cubic root of 825779 is about 93.8183832928.

The spelling of 825779 in words is "eight hundred twenty-five thousand, seven hundred seventy-nine".