678331001 has 2 divisors, whose sum is σ = 678331002. Its totient is φ = 678331000.

The previous prime is 678330997. The next prime is 678331013. The reversal of 678331001 is 100133876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 475240000 + 203091001 = 21800^2 + 14251^2 .

It is a cyclic number.

It is not a de Polignac number, because 678331001 - 2² = 678330997 is a prime.

It is not a weakly prime, because it can be changed into another prime (678331021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339165500 + 339165501.

It is an arithmetic number, because the mean of its divisors is an integer number (339165501).

Almost surely, 2^678331001 is an apocalyptic number.

It is an amenable number.

678331001 is a deficient number, since it is larger than the sum of its proper divisors (1).

678331001 is an equidigital number, since it uses as much as digits as its factorization.

678331001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 678331001 is about 26044.7883654293. The cubic root of 678331001 is about 878.6459034255.

Adding to 678331001 its reverse (100133876), we get a palindrome (778464877).

The spelling of 678331001 in words is "six hundred seventy-eight million, three hundred thirty-one thousand, one".