670128937 has 2 divisors, whose sum is σ = 670128938. Its totient is φ = 670128936.

The previous prime is 670128929. The next prime is 670128947. The reversal of 670128937 is 739821076.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 604373056 + 65755881 = 24584^2 + 8109^2 .

It is a cyclic number.

It is not a de Polignac number, because 670128937 - 2³ = 670128929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 670128893 and 670128902.

It is not a weakly prime, because it can be changed into another prime (670128947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335064468 + 335064469.

It is an arithmetic number, because the mean of its divisors is an integer number (335064469).

Almost surely, 2^670128937 is an apocalyptic number.

It is an amenable number.

670128937 is a deficient number, since it is larger than the sum of its proper divisors (1).

670128937 is an equidigital number, since it uses as much as digits as its factorization.

670128937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 670128937 is about 25886.8487267184. The cubic root of 670128937 is about 875.0901401559.

The spelling of 670128937 in words is "six hundred seventy million, one hundred twenty-eight thousand, nine hundred thirty-seven".