6905487728989 has 2 divisors, whose sum is σ = 6905487728990. Its totient is φ = 6905487728988.

The previous prime is 6905487728957. The next prime is 6905487729013. The reversal of 6905487728989 is 9898277845096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6903451463364 + 2036265625 = 2627442^2 + 45125^2 .

It is a cyclic number.

It is not a de Polignac number, because 6905487728989 - 2⁵ = 6905487728957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6905487728389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3452743864494 + 3452743864495.

It is an arithmetic number, because the mean of its divisors is an integer number (3452743864495).

Almost surely, 2^{6905487728989} is an apocalyptic number.

It is an amenable number.

6905487728989 is a deficient number, since it is larger than the sum of its proper divisors (1).

6905487728989 is an equidigital number, since it uses as much as digits as its factorization.

6905487728989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4389396480, while the sum is 82.

The spelling of 6905487728989 in words is "six trillion, nine hundred five billion, four hundred eighty-seven million, seven hundred twenty-eight thousand, nine hundred eighty-nine".