68338381 has 4 divisors (see below), whose sum is σ = 68418432. Its totient is φ = 68258332.

The previous prime is 68338379. The next prime is 68338399. The reversal of 68338381 is 18383386.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68338381 - 2¹ = 68338379 is a prime.

It is a super-2 number, since 2×68338381² = 9340268635402322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68338301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38731 + ... + 40456.

It is an arithmetic number, because the mean of its divisors is an integer number (17104608).

Almost surely, 2^68338381 is an apocalyptic number.

It is an amenable number.

68338381 is a deficient number, since it is larger than the sum of its proper divisors (80051).

68338381 is an equidigital number, since it uses as much as digits as its factorization.

68338381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80050.

The product of its digits is 82944, while the sum is 40.

The square root of 68338381 is about 8266.7031518012. The cubic root of 68338381 is about 408.8414268018.

The spelling of 68338381 in words is "sixty-eight million, three hundred thirty-eight thousand, three hundred eighty-one".