68247999 has 6 divisors (see below), whose sum is σ = 98580456. Its totient is φ = 45498660.

The previous prime is 68247989. The next prime is 68248007. The reversal of 68247999 is 99974286.

68247999 is a `hidden beast` number, since 6 + 82 + 479 + 99 = 666.

It is not a de Polignac number, because 68247999 - 2⁴ = 68247983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68247989) 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 in 5 ways as a sum of consecutive naturals, for example, 3791547 + ... + 3791564.

It is an arithmetic number, because the mean of its divisors is an integer number (16430076).

Almost surely, 2^68247999 is an apocalyptic number.

68247999 is a deficient number, since it is larger than the sum of its proper divisors (30332457).

68247999 is a wasteful number, since it uses less digits than its factorization.

68247999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7583117 (or 7583114 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 68247999 is about 8261.2347140122. The cubic root of 68247999 is about 408.6611073985.

The spelling of 68247999 in words is "sixty-eight million, two hundred forty-seven thousand, nine hundred ninety-nine".