2449187789 has 2 divisors, whose sum is σ = 2449187790. Its totient is φ = 2449187788.

The previous prime is 2449187749. The next prime is 2449187801. The reversal of 2449187789 is 9877819442.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2439372100 + 9815689 = 49390^2 + 3133^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2449187789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2449187749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1224593894 + 1224593895.

It is an arithmetic number, because the mean of its divisors is an integer number (1224593895).

Almost surely, 2^2449187789 is an apocalyptic number.

It is an amenable number.

2449187789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2449187789 is an equidigital number, since it uses as much as digits as its factorization.

2449187789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8128512, while the sum is 59.

The square root of 2449187789 is about 49489.2694328781. The cubic root of 2449187789 is about 1347.9507617975.

The spelling of 2449187789 in words is "two billion, four hundred forty-nine million, one hundred eighty-seven thousand, seven hundred eighty-nine".