68403999 has 4 divisors (see below), whose sum is σ = 91205336. Its totient is φ = 45602664.

The previous prime is 68403989. The next prime is 68404019. The reversal of 68403999 is 99930486.

It is a happy number.

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

It is not a de Polignac number, because 68403999 - 2⁷ = 68403871 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 (68403989) 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, 11400664 + ... + 11400669.

It is an arithmetic number, because the mean of its divisors is an integer number (22801334).

Almost surely, 2^68403999 is an apocalyptic number.

68403999 is a deficient number, since it is larger than the sum of its proper divisors (22801337).

68403999 is a wasteful number, since it uses less digits than its factorization.

68403999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22801336.

The product of its (nonzero) digits is 419904, while the sum is 48.

The square root of 68403999 is about 8270.6710126809. The cubic root of 68403999 is about 408.9722404308.

The spelling of 68403999 in words is "sixty-eight million, four hundred three thousand, nine hundred ninety-nine".