2547120689 has 2 divisors, whose sum is σ = 2547120690. Its totient is φ = 2547120688.

The previous prime is 2547120649. The next prime is 2547120691. The reversal of 2547120689 is 9860217452.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2226424225 + 320696464 = 47185^2 + 17908^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2547120689 is a prime.

It is a Sophie Germain prime.

Together with 2547120691, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2547120649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1273560344 + 1273560345.

It is an arithmetic number, because the mean of its divisors is an integer number (1273560345).

Almost surely, 2^2547120689 is an apocalyptic number.

It is an amenable number.

2547120689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2547120689 is an equidigital number, since it uses as much as digits as its factorization.

2547120689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 2547120689 is about 50469.0072123477. The cubic root of 2547120689 is about 1365.6828043676.

The spelling of 2547120689 in words is "two billion, five hundred forty-seven million, one hundred twenty thousand, six hundred eighty-nine".