68090845 has 8 divisors (see below), whose sum is σ = 81761976. Its totient is φ = 54437376.

The previous prime is 68090843. The next prime is 68090863. The reversal of 68090845 is 54809086.

It can be written as a sum of positive squares in 4 ways, for example, as 3545689 + 64545156 = 1883^2 + 8034^2 .

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 68090845 - 2¹ = 68090843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68090798 and 68090807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68090843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6549 + ... + 13381.

It is an arithmetic number, because the mean of its divisors is an integer number (10220247).

Almost surely, 2^68090845 is an apocalyptic number.

It is an amenable number.

68090845 is a deficient number, since it is larger than the sum of its proper divisors (13671131).

68090845 is a wasteful number, since it uses less digits than its factorization.

68090845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8831.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 68090845 is about 8251.7176999701. The cubic root of 68090845 is about 408.3471930138.

The spelling of 68090845 in words is "sixty-eight million, ninety thousand, eight hundred forty-five".