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68254613 = 79750659
BaseRepresentation
bin1000001000101…
…11101110010101
311202102200201122
410010113232111
5114433121423
610434533325
71456104020
oct404275625
9152380648
1068254613
1135589779
121aa37245
13111aa25b
1490ca1b7
155ed38c8
hex4117b95

68254613 has 4 divisors (see below), whose sum is σ = 78005280. Its totient is φ = 58503948.

The previous prime is 68254597. The next prime is 68254621. The reversal of 68254613 is 31645286.

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 68254613 - 24 = 68254597 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 (68254673) 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 3 ways as a sum of consecutive naturals, for example, 4875323 + ... + 4875336.

It is an arithmetic number, because the mean of its divisors is an integer number (19501320).

Almost surely, 268254613 is an apocalyptic number.

It is an amenable number.

68254613 is a deficient number, since it is larger than the sum of its proper divisors (9750667).

68254613 is an equidigital number, since it uses as much as digits as its factorization.

68254613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9750666.

The product of its digits is 34560, while the sum is 35.

The square root of 68254613 is about 8261.6350076725. The cubic root of 68254613 is about 408.6743082605.

Adding to 68254613 its reverse (31645286), we get a palindrome (99899899).

The spelling of 68254613 in words is "sixty-eight million, two hundred fifty-four thousand, six hundred thirteen".

Divisors: 1 7 9750659 68254613