5499981 has 10 divisors (see below), whose sum is σ = 8216142. Its totient is φ = 3666600.

The previous prime is 5499979. The next prime is 5500003. The reversal of 5499981 is 1899945.

It can be written as a sum of positive squares in only one way, i.e., 5103081 + 396900 = 2259^2 + 630^2 .

It is not a de Polignac number, because 5499981 - 2¹ = 5499979 is a prime.

It is a super-2 number, since 2×5499981² = 60499582000722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5499931) 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 9 ways as a sum of consecutive naturals, for example, 33870 + ... + 34031.

Almost surely, 2^5499981 is an apocalyptic number.

It is an amenable number.

5499981 is a deficient number, since it is larger than the sum of its proper divisors (2716161).

5499981 is an equidigital number, since it uses as much as digits as its factorization.

5499981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67913 (or 67904 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 5499981 is about 2345.2038290946. The cubic root of 5499981 is about 176.5172135036.

The spelling of 5499981 in words is "five million, four hundred ninety-nine thousand, nine hundred eighty-one".