68540723 has 2 divisors, whose sum is σ = 68540724. Its totient is φ = 68540722.

The previous prime is 68540707. The next prime is 68540729. The reversal of 68540723 is 32704586.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68540723 - 2⁴ = 68540707 is a prime.

It is not a weakly prime, because it can be changed into another prime (68540729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34270361 + 34270362.

It is an arithmetic number, because the mean of its divisors is an integer number (34270362).

Almost surely, 2^68540723 is an apocalyptic number.

68540723 is a deficient number, since it is larger than the sum of its proper divisors (1).

68540723 is an equidigital number, since it uses as much as digits as its factorization.

68540723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 68540723 is about 8278.9324794928. The cubic root of 68540723 is about 409.2445398483.

The spelling of 68540723 in words is "sixty-eight million, five hundred forty thousand, seven hundred twenty-three".