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BaseRepresentation
bin10000110011010011
310111101212
4100303103
54200234
61250335
7404432
oct206323
9114355
1068819
1147783
12339ab
132542a
141b119
15155ce
hex10cd3

68819 has 2 divisors, whose sum is σ = 68820. Its totient is φ = 68818.

The previous prime is 68813. The next prime is 68821. The reversal of 68819 is 91886.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-68819 is a prime.

It is a super-2 number, since 2×688192 = 9472109522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 68821, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 12 and base 15.

It is not a weakly prime, because it can be changed into another prime (68813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34409 + 34410.

It is an arithmetic number, because the mean of its divisors is an integer number (34410).

268819 is an apocalyptic number.

68819 is a deficient number, since it is larger than the sum of its proper divisors (1).

68819 is an equidigital number, since it uses as much as digits as its factorization.

68819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 32.

The square root of 68819 is about 262.3337568823. Note that the first 3 decimals coincide. The cubic root of 68819 is about 40.9797639580.

It can be divided in two parts, 688 and 19, that added together give a palindrome (707).

The spelling of 68819 in words is "sixty-eight thousand, eight hundred nineteen".