68549999 has 4 divisors (see below), whose sum is σ = 78342864. Its totient is φ = 58757136.

The previous prime is 68549963. The next prime is 68550007. The reversal of 68549999 is 99994586.

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 68549999 - 2⁸ = 68549743 is a prime.

It is a Duffinian number.

68549999 is a modest number, since divided by 9999 gives 6854 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68549099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4896422 + ... + 4896435.

It is an arithmetic number, because the mean of its divisors is an integer number (19585716).

Almost surely, 2^68549999 is an apocalyptic number.

68549999 is a deficient number, since it is larger than the sum of its proper divisors (9792865).

68549999 is an equidigital number, since it uses as much as digits as its factorization.

68549999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9792864.

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

The square root of 68549999 is about 8279.4926776947. The cubic root of 68549999 is about 409.2630008009.

The spelling of 68549999 in words is "sixty-eight million, five hundred forty-nine thousand, nine hundred ninety-nine".