68309723 has 8 divisors (see below), whose sum is σ = 72449280. Its totient is φ = 64183680.

The previous prime is 68309713. The next prime is 68309749. The reversal of 68309723 is 32790386.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68309723 - 2¹⁰ = 68308699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68309713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8198 + ... + 14276.

It is an arithmetic number, because the mean of its divisors is an integer number (9056160).

Almost surely, 2^68309723 is an apocalyptic number.

68309723 is a deficient number, since it is larger than the sum of its proper divisors (4139557).

68309723 is a wasteful number, since it uses less digits than its factorization.

68309723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6757.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 68309723 is about 8264.9696309182. The cubic root of 68309723 is about 408.7842689957.

The spelling of 68309723 in words is "sixty-eight million, three hundred nine thousand, seven hundred twenty-three".