5491985 has 4 divisors (see below), whose sum is σ = 6590388. Its totient is φ = 4393584.

The previous prime is 5491979. The next prime is 5491999. The reversal of 5491985 is 5891945.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3598609 + 1893376 = 1897^2 + 1376^2 .

It is a cyclic number.

It is not a de Polignac number, because 5491985 - 2⁸ = 5491729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549194 + ... + 549203.

It is an arithmetic number, because the mean of its divisors is an integer number (1647597).

Almost surely, 2^5491985 is an apocalyptic number.

It is an amenable number.

5491985 is a deficient number, since it is larger than the sum of its proper divisors (1098403).

5491985 is a wasteful number, since it uses less digits than its factorization.

5491985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098402.

The product of its digits is 64800, while the sum is 41.

The square root of 5491985 is about 2343.4984531678. The cubic root of 5491985 is about 176.4316304090.

The spelling of 5491985 in words is "five million, four hundred ninety-one thousand, nine hundred eighty-five".