86616869 has 2 divisors, whose sum is σ = 86616870. Its totient is φ = 86616868.

The previous prime is 86616851. The next prime is 86616899. The reversal of 86616869 is 96861668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60248644 + 26368225 = 7762^2 + 5135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86616869 is a prime.

It is a super-2 number, since 2×86616869² = 15004963990726322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86616809) 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, 43308434 + 43308435.

It is an arithmetic number, because the mean of its divisors is an integer number (43308435).

Almost surely, 2^86616869 is an apocalyptic number.

It is an amenable number.

86616869 is a deficient number, since it is larger than the sum of its proper divisors (1).

86616869 is an equidigital number, since it uses as much as digits as its factorization.

86616869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 50.

The square root of 86616869 is about 9306.8184144744. The cubic root of 86616869 is about 442.4533560802.

The spelling of 86616869 in words is "eighty-six million, six hundred sixteen thousand, eight hundred sixty-nine".