Search a number
-
+
68107007 = 157943133
BaseRepresentation
bin1000000111100…
…11101011111111
311202011012020202
410003303223333
5114413411012
610431434115
71454620463
oct403635377
9152135222
1068107007
1135498891
121a98593b
1311158007
14908c4a3
155ea4cc2
hex40f3aff

68107007 has 4 divisors (see below), whose sum is σ = 68151720. Its totient is φ = 68062296.

The previous prime is 68106989. The next prime is 68107009. The reversal of 68107007 is 70070186.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70070186 = 235035093.

It is a cyclic number.

It is not a de Polignac number, because 68107007 - 218 = 67844863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68107009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19988 + ... + 23145.

It is an arithmetic number, because the mean of its divisors is an integer number (17037930).

Almost surely, 268107007 is an apocalyptic number.

68107007 is a deficient number, since it is larger than the sum of its proper divisors (44713).

68107007 is a wasteful number, since it uses less digits than its factorization.

68107007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44712.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 68107007 is about 8252.6969531178. The cubic root of 68107007 is about 408.3794988019.

The spelling of 68107007 in words is "sixty-eight million, one hundred seven thousand, seven".

Divisors: 1 1579 43133 68107007