2149787449 has 2 divisors, whose sum is σ = 2149787450. Its totient is φ = 2149787448.

The previous prime is 2149787407. The next prime is 2149787461. The reversal of 2149787449 is 9447879412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1206867600 + 942919849 = 34740^2 + 30707^2 .

It is a cyclic number.

It is not a de Polignac number, because 2149787449 - 2¹³ = 2149779257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2149787449.

It is not a weakly prime, because it can be changed into another prime (2149784449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1074893724 + 1074893725.

It is an arithmetic number, because the mean of its divisors is an integer number (1074893725).

Almost surely, 2^2149787449 is an apocalyptic number.

It is an amenable number.

2149787449 is a deficient number, since it is larger than the sum of its proper divisors (1).

2149787449 is an equidigital number, since it uses as much as digits as its factorization.

2149787449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 55.

The square root of 2149787449 is about 46365.8004244508. The cubic root of 2149787449 is about 1290.6203472280.

The spelling of 2149787449 in words is "two billion, one hundred forty-nine million, seven hundred eighty-seven thousand, four hundred forty-nine".