6521000693 has 2 divisors, whose sum is σ = 6521000694. Its totient is φ = 6521000692.

The previous prime is 6521000599. The next prime is 6521000737. The reversal of 6521000693 is 3960001256.

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., 5532086884 + 988913809 = 74378^2 + 31447^2 .

It is a cyclic number.

It is not a de Polignac number, because 6521000693 - 2¹² = 6520996597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6521000093) 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, 3260500346 + 3260500347.

It is an arithmetic number, because the mean of its divisors is an integer number (3260500347).

Almost surely, 2^6521000693 is an apocalyptic number.

It is an amenable number.

6521000693 is a deficient number, since it is larger than the sum of its proper divisors (1).

6521000693 is an equidigital number, since it uses as much as digits as its factorization.

6521000693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 6521000693 is about 80752.7132237673. The cubic root of 6521000693 is about 1868.2632977516.

The spelling of 6521000693 in words is "six billion, five hundred twenty-one million, six hundred ninety-three", and thus it is an aban number.