99986647 has 2 divisors, whose sum is σ = 99986648. Its totient is φ = 99986646.

The previous prime is 99986641. The next prime is 99986657. The reversal of 99986647 is 74668999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99986647 - 2¹⁵ = 99953879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99986591 and 99986600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99986641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49993323 + 49993324.

It is an arithmetic number, because the mean of its divisors is an integer number (49993324).

Almost surely, 2^99986647 is an apocalyptic number.

99986647 is a deficient number, since it is larger than the sum of its proper divisors (1).

99986647 is an equidigital number, since it uses as much as digits as its factorization.

99986647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 58.

The square root of 99986647 is about 9999.3323277107. The cubic root of 99986647 is about 464.1382227297.

The spelling of 99986647 in words is "ninety-nine million, nine hundred eighty-six thousand, six hundred forty-seven".