68657 has 4 divisors (see below), whose sum is σ = 69696. Its totient is φ = 67620.

The previous prime is 68639. The next prime is 68659. The reversal of 68657 is 75686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68657 - 2¹⁶ = 3121 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 68657.

It is not an unprimeable number, because it can be changed into a prime (68659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413 + ... + 554.

It is an arithmetic number, because the mean of its divisors is an integer number (17424).

2⁶⁸⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

68657 is a deficient number, since it is larger than the sum of its proper divisors (1039).

68657 is an equidigital number, since it uses as much as digits as its factorization.

68657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038.

The product of its digits is 10080, while the sum is 32.

The square root of 68657 is about 262.0248079858. The cubic root of 68657 is about 40.9475832241.

The spelling of 68657 in words is "sixty-eight thousand, six hundred fifty-seven".