68723845 has 8 divisors (see below), whose sum is σ = 82733976. Its totient is φ = 54802176.

The previous prime is 68723827. The next prime is 68723887. The reversal of 68723845 is 54832786.

It can be written as a sum of positive squares in 4 ways, for example, as 842724 + 67881121 = 918^2 + 8239^2 .

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 68723845 - 2⁵ = 68723813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20392 + ... + 23521.

It is an arithmetic number, because the mean of its divisors is an integer number (10341747).

Almost surely, 2^68723845 is an apocalyptic number.

It is an amenable number.

68723845 is a deficient number, since it is larger than the sum of its proper divisors (14010131).

68723845 is a wasteful number, since it uses less digits than its factorization.

68723845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44231.

The product of its digits is 322560, while the sum is 43.

The square root of 68723845 is about 8289.9846200099. The cubic root of 68723845 is about 409.6086787769.

The spelling of 68723845 in words is "sixty-eight million, seven hundred twenty-three thousand, eight hundred forty-five".