6813529901 has 2 divisors, whose sum is σ = 6813529902. Its totient is φ = 6813529900.

The previous prime is 6813529873. The next prime is 6813529999. The reversal of 6813529901 is 1099253186.

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., 6164605225 + 648924676 = 78515^2 + 25474^2 .

It is a cyclic number.

It is not a de Polignac number, because 6813529901 - 2⁶ = 6813529837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6813579901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3406764950 + 3406764951.

It is an arithmetic number, because the mean of its divisors is an integer number (3406764951).

Almost surely, 2^6813529901 is an apocalyptic number.

It is an amenable number.

6813529901 is a deficient number, since it is larger than the sum of its proper divisors (1).

6813529901 is an equidigital number, since it uses as much as digits as its factorization.

6813529901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 6813529901 is about 82544.1088206784. The cubic root of 6813529901 is about 1895.7921561950.

The spelling of 6813529901 in words is "six billion, eight hundred thirteen million, five hundred twenty-nine thousand, nine hundred one".