5491897 has 4 divisors (see below), whose sum is σ = 5585040. Its totient is φ = 5398756.

The previous prime is 5491883. The next prime is 5491907. The reversal of 5491897 is 7981945.

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: 7981945 = 5 ⋅1596389.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5491897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5491847) 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, 46483 + ... + 46600.

It is an arithmetic number, because the mean of its divisors is an integer number (1396260).

Almost surely, 2^5491897 is an apocalyptic number.

It is an amenable number.

5491897 is a deficient number, since it is larger than the sum of its proper divisors (93143).

5491897 is an equidigital number, since it uses as much as digits as its factorization.

5491897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93142.

The product of its digits is 90720, while the sum is 43.

The square root of 5491897 is about 2343.4796777442. The cubic root of 5491897 is about 176.4306880620.

The spelling of 5491897 in words is "five million, four hundred ninety-one thousand, eight hundred ninety-seven".