86999849 has 2 divisors, whose sum is σ = 86999850. Its totient is φ = 86999848.

The previous prime is 86999813. The next prime is 86999873. The reversal of 86999849 is 94899968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86359849 + 640000 = 9293^2 + 800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86999849 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 86999791 and 86999800.

It is not a weakly prime, because it can be changed into another prime (86999249) 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, 43499924 + 43499925.

It is an arithmetic number, because the mean of its divisors is an integer number (43499925).

Almost surely, 2^86999849 is an apocalyptic number.

It is an amenable number.

86999849 is a deficient number, since it is larger than the sum of its proper divisors (1).

86999849 is an equidigital number, since it uses as much as digits as its factorization.

86999849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10077696, while the sum is 62.

The square root of 86999849 is about 9327.3709586357. The cubic root of 86999849 is about 443.1045058136.

The spelling of 86999849 in words is "eighty-six million, nine hundred ninety-nine thousand, eight hundred forty-nine".