6905405813 has 2 divisors, whose sum is σ = 6905405814. Its totient is φ = 6905405812.

The previous prime is 6905405791. The next prime is 6905405861. The reversal of 6905405813 is 3185045096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6899461969 + 5943844 = 83063^2 + 2438^2 .

It is a cyclic number.

It is not a de Polignac number, because 6905405813 - 2²² = 6901211509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6905455813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3452702906 + 3452702907.

It is an arithmetic number, because the mean of its divisors is an integer number (3452702907).

Almost surely, 2^6905405813 is an apocalyptic number.

It is an amenable number.

6905405813 is a deficient number, since it is larger than the sum of its proper divisors (1).

6905405813 is an equidigital number, since it uses as much as digits as its factorization.

6905405813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 6905405813 is about 83098.7714289447. The cubic root of 6905405813 is about 1904.2753046119.

The spelling of 6905405813 in words is "six billion, nine hundred five million, four hundred five thousand, eight hundred thirteen".