68145994 has 16 divisors (see below), whose sum is σ = 116928000. Its totient is φ = 29178864.

The previous prime is 68145991. The next prime is 68145997. The reversal of 68145994 is 49954186.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (68145991) and next prime (68145997).

It is not an unprimeable number, because it can be changed into a prime (68145991) 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 7 ways as a sum of consecutive naturals, for example, 27207 + ... + 29605.

It is an arithmetic number, because the mean of its divisors is an integer number (7308000).

Almost surely, 2^68145994 is an apocalyptic number.

68145994 is a deficient number, since it is larger than the sum of its proper divisors (48782006).

68145994 is a wasteful number, since it uses less digits than its factorization.

68145994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4437.

The product of its digits is 311040, while the sum is 46.

The square root of 68145994 is about 8255.0586914934. The cubic root of 68145994 is about 408.4574078412.

The spelling of 68145994 in words is "sixty-eight million, one hundred forty-five thousand, nine hundred ninety-four".