2549389481 has 2 divisors, whose sum is σ = 2549389482. Its totient is φ = 2549389480.

The previous prime is 2549389477. The next prime is 2549389523. The reversal of 2549389481 is 1849839452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2549341081 + 48400 = 50491^2 + 220^2 .

It is a cyclic number.

It is not a de Polignac number, because 2549389481 - 2² = 2549389477 is a prime.

It is a super-2 number, since 2×2549389481² = 12998773451666898722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2549389441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1274694740 + 1274694741.

It is an arithmetic number, because the mean of its divisors is an integer number (1274694741).

Almost surely, 2^2549389481 is an apocalyptic number.

It is an amenable number.

2549389481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2549389481 is an equidigital number, since it uses as much as digits as its factorization.

2549389481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2488320, while the sum is 53.

The square root of 2549389481 is about 50491.4792910645. The cubic root of 2549389481 is about 1366.0881680567.

The spelling of 2549389481 in words is "two billion, five hundred forty-nine million, three hundred eighty-nine thousand, four hundred eighty-one".