68730971 has 2 divisors, whose sum is σ = 68730972. Its totient is φ = 68730970.

The previous prime is 68730917. The next prime is 68731001. The reversal of 68730971 is 17903786.

Together with previous prime (68730917) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68730971 is a prime.

It is not a weakly prime, because it can be changed into another prime (68730901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34365485 + 34365486.

It is an arithmetic number, because the mean of its divisors is an integer number (34365486).

Almost surely, 2^68730971 is an apocalyptic number.

68730971 is a deficient number, since it is larger than the sum of its proper divisors (1).

68730971 is an equidigital number, since it uses as much as digits as its factorization.

68730971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 68730971 is about 8290.4144046000. The cubic root of 68730971 is about 409.6228357776.

The spelling of 68730971 in words is "sixty-eight million, seven hundred thirty thousand, nine hundred seventy-one".