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68052313 = 79721759
BaseRepresentation
bin1000000111001…
…10010101011001
311202001102020001
410003212111121
5114410133223
610430333001
71454302150
oct403462531
9152042201
1068052313
113546078a
121a95a161
1311139154
149076597
155e939ad
hex40e6559

68052313 has 4 divisors (see below), whose sum is σ = 77774080. Its totient is φ = 58330548.

The previous prime is 68052301. The next prime is 68052317. The reversal of 68052313 is 31325086.

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 68052313 - 217 = 67921241 is a prime.

It is a super-2 number, since 2×680523132 = 9262234609299938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68052317) 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, 4860873 + ... + 4860886.

It is an arithmetic number, because the mean of its divisors is an integer number (19443520).

Almost surely, 268052313 is an apocalyptic number.

It is an amenable number.

68052313 is a deficient number, since it is larger than the sum of its proper divisors (9721767).

68052313 is an equidigital number, since it uses as much as digits as its factorization.

68052313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9721766.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 68052313 is about 8249.3825829573. The cubic root of 68052313 is about 408.2701518052.

Adding to 68052313 its reverse (31325086), we get a palindrome (99377399).

The spelling of 68052313 in words is "sixty-eight million, fifty-two thousand, three hundred thirteen".

Divisors: 1 7 9721759 68052313