678099229 has 2 divisors, whose sum is σ = 678099230. Its totient is φ = 678099228.

The previous prime is 678099211. The next prime is 678099269. The reversal of 678099229 is 922990876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 641254329 + 36844900 = 25323^2 + 6070^2 .

It is a cyclic number.

It is not a de Polignac number, because 678099229 - 2¹¹ = 678097181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678099209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339049614 + 339049615.

It is an arithmetic number, because the mean of its divisors is an integer number (339049615).

Almost surely, 2^678099229 is an apocalyptic number.

It is an amenable number.

678099229 is a deficient number, since it is larger than the sum of its proper divisors (1).

678099229 is an equidigital number, since it uses as much as digits as its factorization.

678099229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 52.

The square root of 678099229 is about 26040.3384962638. The cubic root of 678099229 is about 878.5458201740.

The spelling of 678099229 in words is "six hundred seventy-eight million, ninety-nine thousand, two hundred twenty-nine".