68641847 has 2 divisors, whose sum is σ = 68641848. Its totient is φ = 68641846.

The previous prime is 68641841. The next prime is 68641871. The reversal of 68641847 is 74814686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68641847 - 2¹⁰ = 68640823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68641798 and 68641807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68641841) 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, 34320923 + 34320924.

It is an arithmetic number, because the mean of its divisors is an integer number (34320924).

Almost surely, 2^68641847 is an apocalyptic number.

68641847 is a deficient number, since it is larger than the sum of its proper divisors (1).

68641847 is an equidigital number, since it uses as much as digits as its factorization.

68641847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 44.

The square root of 68641847 is about 8285.0375376337. The cubic root of 68641847 is about 409.4457054573.

The spelling of 68641847 in words is "sixty-eight million, six hundred forty-one thousand, eight hundred forty-seven".