68588381 has 2 divisors, whose sum is σ = 68588382. Its totient is φ = 68588380.

The previous prime is 68588371. The next prime is 68588389. The reversal of 68588381 is 18388586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35295481 + 33292900 = 5941^2 + 5770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68588381 is a prime.

It is a super-2 number, since 2×68588381² = 9408732016402322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68588389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34294190 + 34294191.

It is an arithmetic number, because the mean of its divisors is an integer number (34294191).

Almost surely, 2^68588381 is an apocalyptic number.

It is an amenable number.

68588381 is a deficient number, since it is larger than the sum of its proper divisors (1).

68588381 is an equidigital number, since it uses as much as digits as its factorization.

68588381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 368640, while the sum is 47.

The square root of 68588381 is about 8281.8102489733. The cubic root of 68588381 is about 409.3393703699.

The spelling of 68588381 in words is "sixty-eight million, five hundred eighty-eight thousand, three hundred eighty-one".