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68012913 = 3191193209
BaseRepresentation
bin1000000110111…
…00101101110001
311201222102011210
410003130231301
5114402403123
610425430333
71454046243
oct403345561
9151872153
1068012913
1135434121
121a93b3a9
1311124237
149066093
155e86e93
hex40dcb71

68012913 has 8 divisors (see below), whose sum is σ = 95456800. Its totient is φ = 42955488.

The previous prime is 68012911. The next prime is 68012927. The reversal of 68012913 is 31921086.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68012913 - 21 = 68012911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68012911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 596548 + ... + 596661.

It is an arithmetic number, because the mean of its divisors is an integer number (11932100).

Almost surely, 268012913 is an apocalyptic number.

It is an amenable number.

68012913 is a deficient number, since it is larger than the sum of its proper divisors (27443887).

68012913 is a wasteful number, since it uses less digits than its factorization.

68012913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193231.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 68012913 is about 8246.9941796997. The cubic root of 68012913 is about 408.1913450331.

Adding to 68012913 its reverse (31921086), we get a palindrome (99933999).

The spelling of 68012913 in words is "sixty-eight million, twelve thousand, nine hundred thirteen".

Divisors: 1 3 19 57 1193209 3579627 22670971 68012913