68119021 has 2 divisors, whose sum is σ = 68119022. Its totient is φ = 68119020.

The previous prime is 68119019. The next prime is 68119043. The reversal of 68119021 is 12091186.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51194025 + 16924996 = 7155^2 + 4114^2 .

It is a cyclic number.

It is not a de Polignac number, because 68119021 - 2¹ = 68119019 is a prime.

It is a super-3 number, since 3×68119021³ (a number of 24 digits) contains 333 as substring.

Together with 68119019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68119061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34059510 + 34059511.

It is an arithmetic number, because the mean of its divisors is an integer number (34059511).

Almost surely, 2^68119021 is an apocalyptic number.

It is an amenable number.

68119021 is a deficient number, since it is larger than the sum of its proper divisors (1).

68119021 is an equidigital number, since it uses as much as digits as its factorization.

68119021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 68119021 is about 8253.4248042858. The cubic root of 68119021 is about 408.4035099527.

The spelling of 68119021 in words is "sixty-eight million, one hundred nineteen thousand, twenty-one".