85688579 has 2 divisors, whose sum is σ = 85688580. Its totient is φ = 85688578.

The previous prime is 85688573. The next prime is 85688597. The reversal of 85688579 is 97588658.

Together with next prime (85688597) 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 85688579 - 2⁴ = 85688563 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85688573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42844289 + 42844290.

It is an arithmetic number, because the mean of its divisors is an integer number (42844290).

Almost surely, 2^85688579 is an apocalyptic number.

85688579 is a deficient number, since it is larger than the sum of its proper divisors (1).

85688579 is an equidigital number, since it uses as much as digits as its factorization.

85688579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4838400, while the sum is 56.

The square root of 85688579 is about 9256.8125723707. The cubic root of 85688579 is about 440.8670557697.

The spelling of 85688579 in words is "eighty-five million, six hundred eighty-eight thousand, five hundred seventy-nine".