85579679 has 2 divisors, whose sum is σ = 85579680. Its totient is φ = 85579678.

The previous prime is 85579661. The next prime is 85579691. The reversal of 85579679 is 97697558.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85579679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85579699) 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, 42789839 + 42789840.

It is an arithmetic number, because the mean of its divisors is an integer number (42789840).

Almost surely, 2^85579679 is an apocalyptic number.

85579679 is a deficient number, since it is larger than the sum of its proper divisors (1).

85579679 is an equidigital number, since it uses as much as digits as its factorization.

85579679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4762800, while the sum is 56.

The square root of 85579679 is about 9250.9285479891. The cubic root of 85579679 is about 440.6802133852.

The spelling of 85579679 in words is "eighty-five million, five hundred seventy-nine thousand, six hundred seventy-nine".