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68755 = 513751
BaseRepresentation
bin10000110010010011
310111022111
4100302103
54200010
61250151
7404311
oct206223
9114274
1068755
1147725
1233957
13253ab
141b0b1
151558a
hex10c93

68755 has 4 divisors (see below), whose sum is σ = 82512. Its totient is φ = 55000.

The previous prime is 68749. The next prime is 68767. The reversal of 68755 is 55786.

Adding to 68755 its sum of digits (31), we get a palindrome (68786).

68755 is nontrivially palindromic in base 14.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55786 = 227893.

It is a de Polignac number, because none of the positive numbers 2k-68755 is a prime.

It is an Ulam number.

It is a Duffinian number.

68755 is a lucky number.

It is a plaindrome in base 15.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6871 + ... + 6880.

It is an arithmetic number, because the mean of its divisors is an integer number (20628).

268755 is an apocalyptic number.

68755 is a deficient number, since it is larger than the sum of its proper divisors (13757).

68755 is a wasteful number, since it uses less digits than its factorization.

68755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13756.

The product of its digits is 8400, while the sum is 31.

The square root of 68755 is about 262.2117464951. The cubic root of 68755 is about 40.9670566226.

The spelling of 68755 in words is "sixty-eight thousand, seven hundred fifty-five".

Divisors: 1 5 13751 68755