86699035809 has 27 divisors (see below), whose sum is σ = 127397756889. Its totient is φ = 56816493120.

The previous prime is 86699035783. The next prime is 86699035849. The reversal of 86699035809 is 90853099668.

The square root of 86699035809 is 294447.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 86545809 + 86612490000 = 9303^2 + 294300^2 .

It is not a de Polignac number, because 86699035809 - 2¹⁷ = 86698904737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86699035849) 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 in 26 ways as a sum of consecutive naturals, for example, 53882997 + ... + 53884605.

Almost surely, 2^86699035809 is an apocalyptic number.

86699035809 is the 294447-th square number.

86699035809 is the 147224-th centered octagonal number.

It is an amenable number.

86699035809 is a deficient number, since it is larger than the sum of its proper divisors (40698721080).

86699035809 is an frugal number, since it uses more digits than its factorization.

86699035809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3346 (or 1673 counting only the distinct ones).

The product of its (nonzero) digits is 25194240, while the sum is 63.

The spelling of 86699035809 in words is "eighty-six billion, six hundred ninety-nine million, thirty-five thousand, eight hundred nine".