85577719 has 2 divisors, whose sum is σ = 85577720. Its totient is φ = 85577718.

The previous prime is 85577699. The next prime is 85577747. The reversal of 85577719 is 91777558.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85577719 - 2⁹ = 85577207 is a prime.

It is a super-2 number, since 2×85577719² = 14647091978485922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85577749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42788859 + 42788860.

It is an arithmetic number, because the mean of its divisors is an integer number (42788860).

Almost surely, 2^85577719 is an apocalyptic number.

85577719 is a deficient number, since it is larger than the sum of its proper divisors (1).

85577719 is an equidigital number, since it uses as much as digits as its factorization.

85577719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 617400, while the sum is 49.

The square root of 85577719 is about 9250.8226120708. The cubic root of 85577719 is about 440.6768491138.

The spelling of 85577719 in words is "eighty-five million, five hundred seventy-seven thousand, seven hundred nineteen".