678244201 has 2 divisors, whose sum is σ = 678244202. Its totient is φ = 678244200.

The previous prime is 678244187. The next prime is 678244207. The reversal of 678244201 is 102442876.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 427496976 + 250747225 = 20676^2 + 15835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678244201 is a prime.

It is not a weakly prime, because it can be changed into another prime (678244207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339122100 + 339122101.

It is an arithmetic number, because the mean of its divisors is an integer number (339122101).

Almost surely, 2^678244201 is an apocalyptic number.

It is an amenable number.

678244201 is a deficient number, since it is larger than the sum of its proper divisors (1).

678244201 is an equidigital number, since it uses as much as digits as its factorization.

678244201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 678244201 is about 26043.1219518705. The cubic root of 678244201 is about 878.6084243199.

The spelling of 678244201 in words is "six hundred seventy-eight million, two hundred forty-four thousand, two hundred one".