68017381 has 2 divisors, whose sum is σ = 68017382. Its totient is φ = 68017380.

The previous prime is 68017373. The next prime is 68017399. The reversal of 68017381 is 18371086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48525156 + 19492225 = 6966^2 + 4415^2 .

It is a cyclic number.

It is not a de Polignac number, because 68017381 - 2³ = 68017373 is a prime.

It is a super-2 number, since 2×68017381² = 9252728236198322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68017331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34008690 + 34008691.

It is an arithmetic number, because the mean of its divisors is an integer number (34008691).

Almost surely, 2^68017381 is an apocalyptic number.

It is an amenable number.

68017381 is a deficient number, since it is larger than the sum of its proper divisors (1).

68017381 is an equidigital number, since it uses as much as digits as its factorization.

68017381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 68017381 is about 8247.2650618250. The cubic root of 68017381 is about 408.2002833308.

The spelling of 68017381 in words is "sixty-eight million, seventeen thousand, three hundred eighty-one".