68563393 has 4 divisors (see below), whose sum is σ = 69023700. Its totient is φ = 68103088.

The previous prime is 68563379. The next prime is 68563399. The reversal of 68563393 is 39336586.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20358144 + 48205249 = 4512^2 + 6943^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68563393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68563399) 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, 229930 + ... + 230227.

It is an arithmetic number, because the mean of its divisors is an integer number (17255925).

Almost surely, 2^68563393 is an apocalyptic number.

It is an amenable number.

68563393 is a deficient number, since it is larger than the sum of its proper divisors (460307).

68563393 is a wasteful number, since it uses less digits than its factorization.

68563393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460306.

The product of its digits is 349920, while the sum is 43.

The square root of 68563393 is about 8280.3015041724. The cubic root of 68563393 is about 409.2896543955.

The spelling of 68563393 in words is "sixty-eight million, five hundred sixty-three thousand, three hundred ninety-three".