68357985 has 8 divisors (see below), whose sum is σ = 109372800. Its totient is φ = 36457584.

The previous prime is 68357983. The next prime is 68357987. The reversal of 68357985 is 58975386.

It is an interprime number because it is at equal distance from previous prime (68357983) and next prime (68357987).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68357985 - 2¹ = 68357983 is a prime.

It is a super-2 number, since 2×68357985² = 9345628226520450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68357983) 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, 2278585 + ... + 2278614.

It is an arithmetic number, because the mean of its divisors is an integer number (13671600).

Almost surely, 2^68357985 is an apocalyptic number.

It is an amenable number.

68357985 is a deficient number, since it is larger than the sum of its proper divisors (41014815).

68357985 is a wasteful number, since it uses less digits than its factorization.

68357985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4557207.

The product of its digits is 1814400, while the sum is 51.

The square root of 68357985 is about 8267.8887873507. Note that the first 3 decimals coincide. The cubic root of 68357985 is about 408.8805173828.

The spelling of 68357985 in words is "sixty-eight million, three hundred fifty-seven thousand, nine hundred eighty-five".