5381249449 has 9 divisors (see below), whose sum is σ = 5439153573. Its totient is φ = 5323957632.

The previous prime is 5381249437. The next prime is 5381249459. The reversal of 5381249449 is 9449421835.

It is a happy number.

The square root of 5381249449 is 73357.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 3667225 + 5377582224 = 1915^2 + 73332^2 .

It is not a de Polignac number, because 5381249449 - 2²³ = 5372860841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5381249429) 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 in 8 ways as a sum of consecutive naturals, for example, 7995577 + ... + 7996249.

It is an arithmetic number, because the mean of its divisors is an integer number (604350397).

Almost surely, 2^5381249449 is an apocalyptic number.

5381249449 is the 73357-th square number.

5381249449 is the 36679-th centered octagonal number.

It is an amenable number.

5381249449 is a deficient number, since it is larger than the sum of its proper divisors (57904124).

5381249449 is an frugal number, since it uses more digits than its factorization.

5381249449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564 (or 782 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

The cubic root of 5381249449 is about 1752.3776605054.

Multiplying 5381249449 by its sum of digits (49), we get a square (263681223001 = 513499²).

The spelling of 5381249449 in words is "five billion, three hundred eighty-one million, two hundred forty-nine thousand, four hundred forty-nine".