68908393 has 8 divisors (see below), whose sum is σ = 70974728. Its totient is φ = 66852864.

The previous prime is 68908387. The next prime is 68908409. The reversal of 68908393 is 39380986.

It can be written as a sum of positive squares in 4 ways, for example, as 19740249 + 49168144 = 4443^2 + 7012^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68908393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68908363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11305 + ... + 16297.

It is an arithmetic number, because the mean of its divisors is an integer number (8871841).

Almost surely, 2^68908393 is an apocalyptic number.

It is an amenable number.

68908393 is a deficient number, since it is larger than the sum of its proper divisors (2066335).

68908393 is a wasteful number, since it uses less digits than its factorization.

68908393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5403.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 68908393 is about 8301.1079381008. The cubic root of 68908393 is about 409.9749994670.

The spelling of 68908393 in words is "sixty-eight million, nine hundred eight thousand, three hundred ninety-three".