6901989217 has 2 divisors, whose sum is σ = 6901989218. Its totient is φ = 6901989216.

The previous prime is 6901989209. The next prime is 6901989317. The reversal of 6901989217 is 7129891096.

6901989217 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5154665616 + 1747323601 = 71796^2 + 41801^2 .

It is a cyclic number.

It is not a de Polignac number, because 6901989217 - 2³ = 6901989209 is a prime.

It is not a weakly prime, because it can be changed into another prime (6901989317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3450994608 + 3450994609.

It is an arithmetic number, because the mean of its divisors is an integer number (3450994609).

Almost surely, 2^6901989217 is an apocalyptic number.

It is an amenable number.

6901989217 is a deficient number, since it is larger than the sum of its proper divisors (1).

6901989217 is an equidigital number, since it uses as much as digits as its factorization.

6901989217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 52.

The square root of 6901989217 is about 83078.2114456011. The cubic root of 6901989217 is about 1903.9611926018.

The spelling of 6901989217 in words is "six billion, nine hundred one million, nine hundred eighty-nine thousand, two hundred seventeen".