825679 has 2 divisors, whose sum is σ = 825680. Its totient is φ = 825678.

The previous prime is 825661. The next prime is 825689. The reversal of 825679 is 976528.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 825679 - 2⁵ = 825647 is a prime.

It is a super-2 number, since 2×825679² = 1363491622082, which contains 22 as substring.

It is a Chen prime.

It is a d-powerful number, because it can be written as 8⁶ + 2¹⁴ + 6² + 5⁶ + 7² + 9⁶ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (825689) 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, 412839 + 412840.

It is an arithmetic number, because the mean of its divisors is an integer number (412840).

2⁸²⁵⁶⁷⁹ is an apocalyptic number.

825679 is a deficient number, since it is larger than the sum of its proper divisors (1).

825679 is an equidigital number, since it uses as much as digits as its factorization.

825679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 825679 is about 908.6688065517. The cubic root of 825679 is about 93.8145960741.

The spelling of 825679 in words is "eight hundred twenty-five thousand, six hundred seventy-nine".