Search a number
68660593 is a prime number
BaseRepresentation
bin1000001011110…
…10110101110001
311210012022121221
410011322311301
5120034114333
610451345041
71462414441
oct405726561
9153168557
1068660593
11358367a1
121abb2181
13112bcc91
149194121
156063d2d

68660593 has 2 divisors, whose sum is σ = 68660594. Its totient is φ = 68660592.

The previous prime is 68660591. The next prime is 68660597. The reversal of 68660593 is 39506686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40602384 + 28058209 = 6372^2 + 5297^2 .

It is a cyclic number.

It is not a de Polignac number, because 68660593 - 21 = 68660591 is a prime.

It is a super-2 number, since 2×686605932 = 9428554062223298, which contains 22 as substring.

Together with 68660591, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68660591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34330296 + 34330297.

It is an arithmetic number, because the mean of its divisors is an integer number (34330297).

Almost surely, 268660593 is an apocalyptic number.

It is an amenable number.

68660593 is a deficient number, since it is larger than the sum of its proper divisors (1).

68660593 is an equidigital number, since it uses as much as digits as its factorization.

68660593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 68660593 is about 8286.1687769439. The cubic root of 68660593 is about 409.4829750963.

The spelling of 68660593 in words is "sixty-eight million, six hundred sixty thousand, five hundred ninety-three".