68739 has 8 divisors (see below), whose sum is σ = 100032. Its totient is φ = 41640.

The previous prime is 68737. The next prime is 68743. The reversal of 68739 is 93786.

It is a happy number.

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

It is not a de Polignac number, because 68739 - 2¹ = 68737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 2083 = 68739 / (6 + 8 + 7 + 3 + 9).

It is a d-powerful number, because it can be written as 6³ + 8³ + 7⁴ + 3¹⁰ + 9⁴ .

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1009 + ... + 1074.

It is an arithmetic number, because the mean of its divisors is an integer number (12504).

2⁶⁸⁷³⁹ is an apocalyptic number.

68739 is a deficient number, since it is larger than the sum of its proper divisors (31293).

68739 is a wasteful number, since it uses less digits than its factorization.

68739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2097.

The product of its digits is 9072, while the sum is 33.

The square root of 68739 is about 262.1812350265. The cubic root of 68739 is about 40.9638785568.

The spelling of 68739 in words is "sixty-eight thousand, seven hundred thirty-nine".