86409773 has 2 divisors, whose sum is σ = 86409774. Its totient is φ = 86409772.

The previous prime is 86409731. The next prime is 86409797. The reversal of 86409773 is 37790468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59182249 + 27227524 = 7693^2 + 5218^2 .

It is a cyclic number.

It is not a de Polignac number, because 86409773 - 2⁸ = 86409517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86409703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43204886 + 43204887.

It is an arithmetic number, because the mean of its divisors is an integer number (43204887).

Almost surely, 2^86409773 is an apocalyptic number.

It is an amenable number.

86409773 is a deficient number, since it is larger than the sum of its proper divisors (1).

86409773 is an equidigital number, since it uses as much as digits as its factorization.

86409773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 86409773 is about 9295.6857197304. The cubic root of 86409773 is about 442.1004477454.

The spelling of 86409773 in words is "eighty-six million, four hundred nine thousand, seven hundred seventy-three".