68390075 has 18 divisors (see below), whose sum is σ = 91834524. Its totient is φ = 50500320.

The previous prime is 68390059. The next prime is 68390093. The reversal of 68390075 is 57009386.

It is not a de Polignac number, because 68390075 - 2⁴ = 68390059 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 3869 + ... + 12318.

It is an arithmetic number, because the mean of its divisors is an integer number (5101918).

Almost surely, 2^68390075 is an apocalyptic number.

68390075 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

68390075 is a deficient number, since it is larger than the sum of its proper divisors (23444449).

68390075 is a wasteful number, since it uses less digits than its factorization.

68390075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16223 (or 16205 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 68390075 is about 8269.8292001709. The cubic root of 68390075 is about 408.9444890518.

The spelling of 68390075 in words is "sixty-eight million, three hundred ninety thousand, seventy-five".