86549999 has 2 divisors, whose sum is σ = 86550000. Its totient is φ = 86549998.

The previous prime is 86549971. The next prime is 86550001. The reversal of 86549999 is 99994568.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86549999 is a prime.

Together with 86550001, it forms a pair of twin primes.

It is a Chen prime.

86549999 is a modest number, since divided by 9999 gives 8654 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86549909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43274999 + 43275000.

It is an arithmetic number, because the mean of its divisors is an integer number (43275000).

Almost surely, 2^86549999 is an apocalyptic number.

86549999 is a deficient number, since it is larger than the sum of its proper divisors (1).

86549999 is an equidigital number, since it uses as much as digits as its factorization.

86549999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6298560, while the sum is 59.

The square root of 86549999 is about 9303.2251934477. The cubic root of 86549999 is about 442.3394657437.

The spelling of 86549999 in words is "eighty-six million, five hundred forty-nine thousand, nine hundred ninety-nine".