5491657 has 2 divisors, whose sum is σ = 5491658. Its totient is φ = 5491656.

The previous prime is 5491639. The next prime is 5491709. The reversal of 5491657 is 7561945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5470921 + 20736 = 2339^2 + 144^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5491657 is a prime.

5491657 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (5491957) 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 as a sum of consecutive naturals, namely, 2745828 + 2745829.

It is an arithmetic number, because the mean of its divisors is an integer number (2745829).

Almost surely, 2^5491657 is an apocalyptic number.

It is an amenable number.

5491657 is a deficient number, since it is larger than the sum of its proper divisors (1).

5491657 is an equidigital number, since it uses as much as digits as its factorization.

5491657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 37.

The square root of 5491657 is about 2343.4284712788. The cubic root of 5491657 is about 176.4281179736.

The spelling of 5491657 in words is "five million, four hundred ninety-one thousand, six hundred fifty-seven".