Search a number
-
+
68008829 = 79715547
BaseRepresentation
bin1000000110110…
…11101101111101
311201222012120112
410003123231331
5114402240304
610425355405
71454031320
oct403335575
9151865515
1068008829
1135431049
121a938b65
1311122415
1490647b7
155e85b6e
hex40dbb7d

68008829 has 4 divisors (see below), whose sum is σ = 77724384. Its totient is φ = 58293276.

The previous prime is 68008817. The next prime is 68008867. The reversal of 68008829 is 92880086.

It is a happy number.

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 68008829 - 28 = 68008573 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 (68008729) 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, 4857767 + ... + 4857780.

It is an arithmetic number, because the mean of its divisors is an integer number (19431096).

Almost surely, 268008829 is an apocalyptic number.

It is an amenable number.

68008829 is a deficient number, since it is larger than the sum of its proper divisors (9715555).

68008829 is an equidigital number, since it uses as much as digits as its factorization.

68008829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9715554.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 68008829 is about 8246.7465706180. The cubic root of 68008829 is about 408.1831745904.

The spelling of 68008829 in words is "sixty-eight million, eight thousand, eight hundred twenty-nine".

Divisors: 1 7 9715547 68008829