2989648769 has 2 divisors, whose sum is σ = 2989648770. Its totient is φ = 2989648768.

The previous prime is 2989648763. The next prime is 2989648771. The reversal of 2989648769 is 9678469892.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2952292225 + 37356544 = 54335^2 + 6112^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2989648769 is a prime.

It is a super-2 number, since 2×2989648769² = 17875999523966430722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 2989648771, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2989648699 and 2989648708.

It is not a weakly prime, because it can be changed into another prime (2989648763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1494824384 + 1494824385.

It is an arithmetic number, because the mean of its divisors is an integer number (1494824385).

Almost surely, 2^2989648769 is an apocalyptic number.

It is an amenable number.

2989648769 is a deficient number, since it is larger than the sum of its proper divisors (1).

2989648769 is an equidigital number, since it uses as much as digits as its factorization.

2989648769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94058496, while the sum is 68.

The square root of 2989648769 is about 54677.6807207475. The cubic root of 2989648769 is about 1440.5888745395.

The spelling of 2989648769 in words is "two billion, nine hundred eighty-nine million, six hundred forty-eight thousand, seven hundred sixty-nine".