68738 has 4 divisors (see below), whose sum is σ = 103110. Its totient is φ = 34368.

The previous prime is 68737. The next prime is 68743. The reversal of 68738 is 83786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83786 = 2 ⋅41893.

It can be written as a sum of positive squares in only one way, i.e., 38809 + 29929 = 197^2 + 173^2 .

It is an Ulam number.

It is a Curzon number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (68737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17183 + ... + 17186.

2⁶⁸⁷³⁸ is an apocalyptic number.

68738 is a deficient number, since it is larger than the sum of its proper divisors (34372).

68738 is a wasteful number, since it uses less digits than its factorization.

68738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34371.

The product of its digits is 8064, while the sum is 32.

The square root of 68738 is about 262.1793279418. The cubic root of 68738 is about 40.9636799113.

It can be divided in two parts, 687 and 38, that multiplied together give a triangular number (26106 = T₂₂₈).

The spelling of 68738 in words is "sixty-eight thousand, seven hundred thirty-eight".