68530745 has 8 divisors (see below), whose sum is σ = 82302216. Its totient is φ = 54781056.

The previous prime is 68530733. The next prime is 68530783. The reversal of 68530745 is 54703586.

It can be written as a sum of positive squares in 4 ways, for example, as 30880249 + 37650496 = 5557^2 + 6136^2 .

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 68530745 - 2⁴ = 68530729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68530699 and 68530708.

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, 2549 + ... + 11981.

It is an arithmetic number, because the mean of its divisors is an integer number (10287777).

Almost surely, 2^68530745 is an apocalyptic number.

It is an amenable number.

68530745 is a deficient number, since it is larger than the sum of its proper divisors (13771471).

68530745 is a wasteful number, since it uses less digits than its factorization.

68530745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10891.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 68530745 is about 8278.3298436339. The cubic root of 68530745 is about 409.2246799266.

The spelling of 68530745 in words is "sixty-eight million, five hundred thirty thousand, seven hundred forty-five".