68978 has 16 divisors (see below), whose sum is σ = 127680. Its totient is φ = 27216.

The previous prime is 68963. The next prime is 68993. The reversal of 68978 is 87986.

It is an interprime number because it is at equal distance from previous prime (68963) and next prime (68993).

It is a Curzon number.

It is a plaindrome in base 15.

It is an unprimeable number.

68978 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8 + ... + 371.

It is an arithmetic number, because the mean of its divisors is an integer number (7980).

2⁶⁸⁹⁷⁸ is an apocalyptic number.

68978 is a deficient number, since it is larger than the sum of its proper divisors (58702).

68978 is a wasteful number, since it uses less digits than its factorization.

68978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401.

The product of its digits is 24192, while the sum is 38.

The square root of 68978 is about 262.6366311085. The cubic root of 68978 is about 41.0112996815.

It can be divided in two parts, 689 and 78, that added together give a palindrome (767).

The spelling of 68978 in words is "sixty-eight thousand, nine hundred seventy-eight".