Search a number
-
+
68995 = 513799
BaseRepresentation
bin10000110110000011
310111122101
4100312003
54201440
61251231
7405103
oct206603
9114571
1068995
1147923
1233b17
1325534
141b203
151569a
hex10d83

68995 has 4 divisors (see below), whose sum is σ = 82800. Its totient is φ = 55192.

The previous prime is 68993. The next prime is 69001. The reversal of 68995 is 59986.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68995 - 21 = 68993 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68993) by changing a digit.

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, 6895 + ... + 6904.

It is an arithmetic number, because the mean of its divisors is an integer number (20700).

268995 is an apocalyptic number.

68995 is a deficient number, since it is larger than the sum of its proper divisors (13805).

68995 is a wasteful number, since it uses less digits than its factorization.

68995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13804.

The product of its digits is 19440, while the sum is 37.

The square root of 68995 is about 262.6689932215. The cubic root of 68995 is about 41.0146685567.

Subtracting from 68995 its reverse (59986), we obtain a palindrome (9009).

It can be divided in two parts, 689 and 95, that added together give a square (784 = 282).

The spelling of 68995 in words is "sixty-eight thousand, nine hundred ninety-five".

Divisors: 1 5 13799 68995