68420347 has 2 divisors, whose sum is σ = 68420348. Its totient is φ = 68420346.

The previous prime is 68420323. The next prime is 68420351. The reversal of 68420347 is 74302486.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68420347 is a prime.

It is not a weakly prime, because it can be changed into another prime (68420047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34210173 + 34210174.

It is an arithmetic number, because the mean of its divisors is an integer number (34210174).

Almost surely, 2^68420347 is an apocalyptic number.

68420347 is a deficient number, since it is larger than the sum of its proper divisors (1).

68420347 is an equidigital number, since it uses as much as digits as its factorization.

68420347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 68420347 is about 8271.6592652261. The cubic root of 68420347 is about 409.0048181832.

The spelling of 68420347 in words is "sixty-eight million, four hundred twenty thousand, three hundred forty-seven".