68359999 has 4 divisors (see below), whose sum is σ = 68607064. Its totient is φ = 68112936.

The previous prime is 68359987. The next prime is 68360003. The reversal of 68359999 is 99995386.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68359999 - 2¹¹ = 68357951 is a prime.

It is a Duffinian number.

68359999 is a modest number, since divided by 9999 gives 6835 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68359919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123117 + ... + 123670.

It is an arithmetic number, because the mean of its divisors is an integer number (17151766).

Almost surely, 2^68359999 is an apocalyptic number.

68359999 is a deficient number, since it is larger than the sum of its proper divisors (247065).

68359999 is a wasteful number, since it uses less digits than its factorization.

68359999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247064.

The product of its digits is 4723920, while the sum is 58.

The square root of 68359999 is about 8268.0105829637. The cubic root of 68359999 is about 408.8845328965.

The spelling of 68359999 in words is "sixty-eight million, three hundred fifty-nine thousand, nine hundred ninety-nine".