68486491 has 2 divisors, whose sum is σ = 68486492. Its totient is φ = 68486490.

The previous prime is 68486461. The next prime is 68486501. The reversal of 68486491 is 19468486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68486491 - 2¹⁹ = 67962203 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68486461) 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, 34243245 + 34243246.

It is an arithmetic number, because the mean of its divisors is an integer number (34243246).

Almost surely, 2^68486491 is an apocalyptic number.

68486491 is a deficient number, since it is larger than the sum of its proper divisors (1).

68486491 is an equidigital number, since it uses as much as digits as its factorization.

68486491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 46.

The square root of 68486491 is about 8275.6565298470. The cubic root of 68486491 is about 409.1365748065.

The spelling of 68486491 in words is "sixty-eight million, four hundred eighty-six thousand, four hundred ninety-one".