68646863 has 2 divisors, whose sum is σ = 68646864. Its totient is φ = 68646862.

The previous prime is 68646797. The next prime is 68646871. The reversal of 68646863 is 36864686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68646863 - 2¹⁶ = 68581327 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68646463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34323431 + 34323432.

It is an arithmetic number, because the mean of its divisors is an integer number (34323432).

Almost surely, 2^68646863 is an apocalyptic number.

68646863 is a deficient number, since it is larger than the sum of its proper divisors (1).

68646863 is an equidigital number, since it uses as much as digits as its factorization.

68646863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 995328, while the sum is 47.

The square root of 68646863 is about 8285.3402464835. The cubic root of 68646863 is about 409.4556786234.

The spelling of 68646863 in words is "sixty-eight million, six hundred forty-six thousand, eight hundred sixty-three".