85807679 has 2 divisors, whose sum is σ = 85807680. Its totient is φ = 85807678.

The previous prime is 85807669. The next prime is 85807697. The reversal of 85807679 is 97670858.

It is a happy number.

Together with next prime (85807697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85807679 - 2¹² = 85803583 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85807639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42903839 + 42903840.

It is an arithmetic number, because the mean of its divisors is an integer number (42903840).

Almost surely, 2^85807679 is an apocalyptic number.

85807679 is a deficient number, since it is larger than the sum of its proper divisors (1).

85807679 is an equidigital number, since it uses as much as digits as its factorization.

85807679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 85807679 is about 9263.2434384507. The cubic root of 85807679 is about 441.0712173931.

The spelling of 85807679 in words is "eighty-five million, eight hundred seven thousand, six hundred seventy-nine".