68297381 has 16 divisors (see below), whose sum is σ = 76464000. Its totient is φ = 60622848.

The previous prime is 68297363. The next prime is 68297393. The reversal of 68297381 is 18379286.

It is a cyclic number.

It is not a de Polignac number, because 68297381 - 2¹⁰ = 68296357 is a prime.

It is a super-4 number, since 4×68297381⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68297081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113720 + ... + 114318.

It is an arithmetic number, because the mean of its divisors is an integer number (4779000).

Almost surely, 2^68297381 is an apocalyptic number.

It is an amenable number.

68297381 is a deficient number, since it is larger than the sum of its proper divisors (8166619).

68297381 is a wasteful number, since it uses less digits than its factorization.

68297381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988.

The product of its digits is 145152, while the sum is 44.

The square root of 68297381 is about 8264.2229519780. Note that the first 3 decimals coincide. The cubic root of 68297381 is about 408.7596481994.

The spelling of 68297381 in words is "sixty-eight million, two hundred ninety-seven thousand, three hundred eighty-one".