68043994 has 16 divisors (see below), whose sum is σ = 103883328. Its totient is φ = 33419232.

The previous prime is 68043991. The next prime is 68044027. The reversal of 68043994 is 49934086.

It is a super-3 number, since 3×68043994³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68043994.

It is not an unprimeable number, because it can be changed into a prime (68043991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82267 + ... + 83089.

It is an arithmetic number, because the mean of its divisors is an integer number (6492708).

Almost surely, 2^68043994 is an apocalyptic number.

68043994 is a deficient number, since it is larger than the sum of its proper divisors (35839334).

68043994 is a wasteful number, since it uses less digits than its factorization.

68043994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 68043994 is about 8248.8783479937. The cubic root of 68043994 is about 408.2535149090.

The spelling of 68043994 in words is "sixty-eight million, forty-three thousand, nine hundred ninety-four".