5449981 has 4 divisors (see below), whose sum is σ = 5531392. Its totient is φ = 5368572.

The previous prime is 5449957. The next prime is 5449987. The reversal of 5449981 is 1899445.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1899445 = 5 ⋅379889.

It is a cyclic number.

It is not a de Polignac number, because 5449981 - 2⁷ = 5449853 is a prime.

It is a super-2 number, since 2×5449981² = 59404585800722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5449987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40605 + ... + 40738.

It is an arithmetic number, because the mean of its divisors is an integer number (1382848).

Almost surely, 2^5449981 is an apocalyptic number.

It is an amenable number.

5449981 is a deficient number, since it is larger than the sum of its proper divisors (81411).

5449981 is an equidigital number, since it uses as much as digits as its factorization.

5449981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81410.

The product of its digits is 51840, while the sum is 40.

The square root of 5449981 is about 2334.5194366293. The cubic root of 5449981 is about 175.9806818501.

The spelling of 5449981 in words is "five million, four hundred forty-nine thousand, nine hundred eighty-one".