68278849 has 2 divisors, whose sum is σ = 68278850. Its totient is φ = 68278848.

The previous prime is 68278841. The next prime is 68278877. The reversal of 68278849 is 94887286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65092624 + 3186225 = 8068^2 + 1785^2 .

It is a cyclic number.

It is not a de Polignac number, because 68278849 - 2³ = 68278841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68278796 and 68278805.

It is not a weakly prime, because it can be changed into another prime (68278841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34139424 + 34139425.

It is an arithmetic number, because the mean of its divisors is an integer number (34139425).

Almost surely, 2^68278849 is an apocalyptic number.

It is an amenable number.

68278849 is a deficient number, since it is larger than the sum of its proper divisors (1).

68278849 is an equidigital number, since it uses as much as digits as its factorization.

68278849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1548288, while the sum is 52.

The square root of 68278849 is about 8263.1016573681. The cubic root of 68278849 is about 408.7226735310.

The spelling of 68278849 in words is "sixty-eight million, two hundred seventy-eight thousand, eight hundred forty-nine".