Search a number
-
+
68718101 = 86379627
BaseRepresentation
bin1000001100010…
…00111000010101
311210022020111212
410012020320111
5120042434401
610452511205
71463044214
oct406107025
9153266455
1068718101
1135875a21
121b01b505
13113101ca
1491ab07b
156075dbb
hex4188e15

68718101 has 4 divisors (see below), whose sum is σ = 68798592. Its totient is φ = 68637612.

The previous prime is 68718073. The next prime is 68718109. The reversal of 68718101 is 10181786.

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 68718101 - 26 = 68718037 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 (68718109) 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, 38951 + ... + 40676.

It is an arithmetic number, because the mean of its divisors is an integer number (17199648).

Almost surely, 268718101 is an apocalyptic number.

It is an amenable number.

68718101 is a deficient number, since it is larger than the sum of its proper divisors (80491).

68718101 is an equidigital number, since it uses as much as digits as its factorization.

68718101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80490.

The product of its (nonzero) digits is 2688, while the sum is 32.

The square root of 68718101 is about 8289.6381706321. The cubic root of 68718101 is about 409.5972666399.

Adding to 68718101 its reverse (10181786), we get a palindrome (78899887).

The spelling of 68718101 in words is "sixty-eight million, seven hundred eighteen thousand, one hundred one".

Divisors: 1 863 79627 68718101