68603999 has 4 divisors (see below), whose sum is σ = 68649240. Its totient is φ = 68558760.

The previous prime is 68603989. The next prime is 68604001. The reversal of 68603999 is 99930686.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99930686 = 2 ⋅49965343.

It is a cyclic number.

It is not a de Polignac number, because 68603999 - 2¹² = 68599903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68603939) 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 3 ways as a sum of consecutive naturals, for example, 20264 + ... + 23405.

It is an arithmetic number, because the mean of its divisors is an integer number (17162310).

Almost surely, 2^68603999 is an apocalyptic number.

68603999 is a deficient number, since it is larger than the sum of its proper divisors (45241).

68603999 is a wasteful number, since it uses less digits than its factorization.

68603999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45240.

The product of its (nonzero) digits is 629856, while the sum is 50.

The square root of 68603999 is about 8282.7531050974. The cubic root of 68603999 is about 409.3704377170.

The spelling of 68603999 in words is "sixty-eight million, six hundred three thousand, nine hundred ninety-nine".