7130657321 has 2 divisors, whose sum is σ = 7130657322. Its totient is φ = 7130657320.

The previous prime is 7130657309. The next prime is 7130657407. The reversal of 7130657321 is 1237560317.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4568272921 + 2562384400 = 67589^2 + 50620^2 .

It is a cyclic number.

It is not a de Polignac number, because 7130657321 - 2¹⁰ = 7130656297 is a prime.

It is not a weakly prime, because it can be changed into another prime (7130650321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3565328660 + 3565328661.

It is an arithmetic number, because the mean of its divisors is an integer number (3565328661).

Almost surely, 2^7130657321 is an apocalyptic number.

It is an amenable number.

7130657321 is a deficient number, since it is larger than the sum of its proper divisors (1).

7130657321 is an equidigital number, since it uses as much as digits as its factorization.

7130657321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 7130657321 is about 84443.2195087326. The cubic root of 7130657321 is about 1924.7597222784.

The spelling of 7130657321 in words is "seven billion, one hundred thirty million, six hundred fifty-seven thousand, three hundred twenty-one".