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68356289 is a prime number
BaseRepresentation
bin1000001001100…
…00100011000001
311202121212012102
410010300203001
5114444400124
610441040145
71460006321
oct404604301
9152555172
1068356289
1135649101
121aa86055
1311214611
149115281
156003aae
hex41308c1

68356289 has 2 divisors, whose sum is σ = 68356290. Its totient is φ = 68356288.

The previous prime is 68356261. The next prime is 68356297. The reversal of 68356289 is 98265386.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51480625 + 16875664 = 7175^2 + 4108^2 .

It is a cyclic number.

It is not a de Polignac number, because 68356289 - 28 = 68356033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68353289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34178144 + 34178145.

It is an arithmetic number, because the mean of its divisors is an integer number (34178145).

Almost surely, 268356289 is an apocalyptic number.

It is an amenable number.

68356289 is a deficient number, since it is larger than the sum of its proper divisors (1).

68356289 is an equidigital number, since it uses as much as digits as its factorization.

68356289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 47.

The square root of 68356289 is about 8267.7862212324. The cubic root of 68356289 is about 408.8771358364.

The spelling of 68356289 in words is "sixty-eight million, three hundred fifty-six thousand, two hundred eighty-nine".