86428249 has 2 divisors, whose sum is σ = 86428250. Its totient is φ = 86428248.

The previous prime is 86428247. The next prime is 86428259. The reversal of 86428249 is 94282468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66536649 + 19891600 = 8157^2 + 4460^2 .

It is a cyclic number.

It is not a de Polignac number, because 86428249 - 2¹ = 86428247 is a prime.

Together with 86428247, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (86428241) 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, 43214124 + 43214125.

It is an arithmetic number, because the mean of its divisors is an integer number (43214125).

Almost surely, 2^86428249 is an apocalyptic number.

It is an amenable number.

86428249 is a deficient number, since it is larger than the sum of its proper divisors (1).

86428249 is an equidigital number, since it uses as much as digits as its factorization.

86428249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 221184, while the sum is 43.

The square root of 86428249 is about 9296.6794609688. The cubic root of 86428249 is about 442.1319552377.

The spelling of 86428249 in words is "eighty-six million, four hundred twenty-eight thousand, two hundred forty-nine".