86961773 has 2 divisors, whose sum is σ = 86961774. Its totient is φ = 86961772.

The previous prime is 86961769. The next prime is 86961859. The reversal of 86961773 is 37716968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76702564 + 10259209 = 8758^2 + 3203^2 .

It is a cyclic number.

It is not a de Polignac number, because 86961773 - 2² = 86961769 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86961713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43480886 + 43480887.

It is an arithmetic number, because the mean of its divisors is an integer number (43480887).

Almost surely, 2^86961773 is an apocalyptic number.

It is an amenable number.

86961773 is a deficient number, since it is larger than the sum of its proper divisors (1).

86961773 is an equidigital number, since it uses as much as digits as its factorization.

86961773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 47.

The square root of 86961773 is about 9325.3296456479. The cubic root of 86961773 is about 443.0398539424.

The spelling of 86961773 in words is "eighty-six million, nine hundred sixty-one thousand, seven hundred seventy-three".