86866573 has 2 divisors, whose sum is σ = 86866574. Its totient is φ = 86866572.

The previous prime is 86866531. The next prime is 86866597. The reversal of 86866573 is 37566868.

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., 66634569 + 20232004 = 8163^2 + 4498^2 .

It is a cyclic number.

It is not a de Polignac number, because 86866573 - 2¹⁷ = 86735501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86866673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43433286 + 43433287.

It is an arithmetic number, because the mean of its divisors is an integer number (43433287).

Almost surely, 2^86866573 is an apocalyptic number.

It is an amenable number.

86866573 is a deficient number, since it is larger than the sum of its proper divisors (1).

86866573 is an equidigital number, since it uses as much as digits as its factorization.

86866573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 49.

The square root of 86866573 is about 9320.2238707018. The cubic root of 86866573 is about 442.8781246637.

The spelling of 86866573 in words is "eighty-six million, eight hundred sixty-six thousand, five hundred seventy-three".