68747321 has 2 divisors, whose sum is σ = 68747322. Its totient is φ = 68747320.

The previous prime is 68747311. The next prime is 68747333. The reversal of 68747321 is 12374786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62173225 + 6574096 = 7885^2 + 2564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68747321 is a prime.

It is not a weakly prime, because it can be changed into another prime (68747311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34373660 + 34373661.

It is an arithmetic number, because the mean of its divisors is an integer number (34373661).

Almost surely, 2^68747321 is an apocalyptic number.

It is an amenable number.

68747321 is a deficient number, since it is larger than the sum of its proper divisors (1).

68747321 is an equidigital number, since it uses as much as digits as its factorization.

68747321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 38.

The square root of 68747321 is about 8291.4004245363. The cubic root of 68747321 is about 409.6553141120.

The spelling of 68747321 in words is "sixty-eight million, seven hundred forty-seven thousand, three hundred twenty-one".