85320577 has 2 divisors, whose sum is σ = 85320578. Its totient is φ = 85320576.

The previous prime is 85320559. The next prime is 85320589. The reversal of 85320577 is 77502358.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74666881 + 10653696 = 8641^2 + 3264^2 .

It is a cyclic number.

It is not a de Polignac number, because 85320577 - 2¹⁵ = 85287809 is a prime.

It is a super-2 number, since 2×85320577² = 14559201719225858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85320377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42660288 + 42660289.

It is an arithmetic number, because the mean of its divisors is an integer number (42660289).

Almost surely, 2^85320577 is an apocalyptic number.

It is an amenable number.

85320577 is a deficient number, since it is larger than the sum of its proper divisors (1).

85320577 is an equidigital number, since it uses as much as digits as its factorization.

85320577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 85320577 is about 9236.9138244329. The cubic root of 85320577 is about 440.2350276736.

The spelling of 85320577 in words is "eighty-five million, three hundred twenty thousand, five hundred seventy-seven".