6899712305 has 4 divisors (see below), whose sum is σ = 8279654772. Its totient is φ = 5519769840.

The previous prime is 6899712301. The next prime is 6899712353. The reversal of 6899712305 is 5032179986.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1752510769 + 5147201536 = 41863^2 + 71744^2 .

It is not a de Polignac number, because 6899712305 - 2² = 6899712301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6899712301) 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 in 3 ways as a sum of consecutive naturals, for example, 689971226 + ... + 689971235.

It is an arithmetic number, because the mean of its divisors is an integer number (2069913693).

Almost surely, 2^6899712305 is an apocalyptic number.

It is an amenable number.

6899712305 is a deficient number, since it is larger than the sum of its proper divisors (1379942467).

6899712305 is a wasteful number, since it uses less digits than its factorization.

6899712305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379942466.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 6899712305 is about 83064.5068907292. The cubic root of 6899712305 is about 1903.7518022967.

The spelling of 6899712305 in words is "six billion, eight hundred ninety-nine million, seven hundred twelve thousand, three hundred five".