68218747 has 2 divisors, whose sum is σ = 68218748. Its totient is φ = 68218746.

The previous prime is 68218741. The next prime is 68218751. The reversal of 68218747 is 74781286.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68218747 - 2¹⁵ = 68185979 is a prime.

It is not a weakly prime, because it can be changed into another prime (68218741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34109373 + 34109374.

It is an arithmetic number, because the mean of its divisors is an integer number (34109374).

Almost surely, 2^68218747 is an apocalyptic number.

68218747 is a deficient number, since it is larger than the sum of its proper divisors (1).

68218747 is an equidigital number, since it uses as much as digits as its factorization.

68218747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150528, while the sum is 43.

The square root of 68218747 is about 8259.4640867311. The cubic root of 68218747 is about 408.6027131931.

The spelling of 68218747 in words is "sixty-eight million, two hundred eighteen thousand, seven hundred forty-seven".