68243635 has 4 divisors (see below), whose sum is σ = 81892368. Its totient is φ = 54594904.

The previous prime is 68243633. The next prime is 68243647. The reversal of 68243635 is 53634286.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68243635 - 2¹ = 68243633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68243594 and 68243603.

It is not an unprimeable number, because it can be changed into a prime (68243633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6824359 + ... + 6824368.

It is an arithmetic number, because the mean of its divisors is an integer number (20473092).

Almost surely, 2^68243635 is an apocalyptic number.

68243635 is a deficient number, since it is larger than the sum of its proper divisors (13648733).

68243635 is a wasteful number, since it uses less digits than its factorization.

68243635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13648732.

The product of its digits is 103680, while the sum is 37.

The square root of 68243635 is about 8260.9705846226. The cubic root of 68243635 is about 408.6523968374.

The spelling of 68243635 in words is "sixty-eight million, two hundred forty-three thousand, six hundred thirty-five".