85711877 has 2 divisors, whose sum is σ = 85711878. Its totient is φ = 85711876.

The previous prime is 85711817. The next prime is 85711883. The reversal of 85711877 is 77811758.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60621796 + 25090081 = 7786^2 + 5009^2 .

It is a cyclic number.

It is not a de Polignac number, because 85711877 - 2²⁰ = 84663301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85711817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42855938 + 42855939.

It is an arithmetic number, because the mean of its divisors is an integer number (42855939).

Almost surely, 2^85711877 is an apocalyptic number.

It is an amenable number.

85711877 is a deficient number, since it is larger than the sum of its proper divisors (1).

85711877 is an equidigital number, since it uses as much as digits as its factorization.

85711877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 109760, while the sum is 44.

The square root of 85711877 is about 9258.0709113724. The cubic root of 85711877 is about 440.9070081571.

The spelling of 85711877 in words is "eighty-five million, seven hundred eleven thousand, eight hundred seventy-seven".