68881447 has 2 divisors, whose sum is σ = 68881448. Its totient is φ = 68881446.

The previous prime is 68881429. The next prime is 68881453. The reversal of 68881447 is 74418886.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68881447 - 2¹⁵ = 68848679 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68881397 and 68881406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68881487) 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 as a sum of consecutive naturals, namely, 34440723 + 34440724.

It is an arithmetic number, because the mean of its divisors is an integer number (34440724).

Almost surely, 2^68881447 is an apocalyptic number.

68881447 is a deficient number, since it is larger than the sum of its proper divisors (1).

68881447 is an equidigital number, since it uses as much as digits as its factorization.

68881447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 344064, while the sum is 46.

The square root of 68881447 is about 8299.4847430428. The cubic root of 68881447 is about 409.9215535024.

The spelling of 68881447 in words is "sixty-eight million, eight hundred eighty-one thousand, four hundred forty-seven".