86575861 has 2 divisors, whose sum is σ = 86575862. Its totient is φ = 86575860.

The previous prime is 86575831. The next prime is 86575873. The reversal of 86575861 is 16857568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79388100 + 7187761 = 8910^2 + 2681^2 .

It is a cyclic number.

It is not a de Polignac number, because 86575861 - 2¹¹ = 86573813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86575831) 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, 43287930 + 43287931.

It is an arithmetic number, because the mean of its divisors is an integer number (43287931).

Almost surely, 2^86575861 is an apocalyptic number.

It is an amenable number.

86575861 is a deficient number, since it is larger than the sum of its proper divisors (1).

86575861 is an equidigital number, since it uses as much as digits as its factorization.

86575861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 46.

The square root of 86575861 is about 9304.6150377111. The cubic root of 86575861 is about 442.3835198324.

The spelling of 86575861 in words is "eighty-six million, five hundred seventy-five thousand, eight hundred sixty-one".