5561657 has 2 divisors, whose sum is σ = 5561658. Its totient is φ = 5561656.

The previous prime is 5561641. The next prime is 5561659. The reversal of 5561657 is 7561655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2835856 + 2725801 = 1684^2 + 1651^2 .

It is a cyclic number.

It is not a de Polignac number, because 5561657 - 2⁴ = 5561641 is a prime.

Together with 5561659, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5561659) 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, 2780828 + 2780829.

It is an arithmetic number, because the mean of its divisors is an integer number (2780829).

Almost surely, 2^5561657 is an apocalyptic number.

It is an amenable number.

5561657 is a deficient number, since it is larger than the sum of its proper divisors (1).

5561657 is an equidigital number, since it uses as much as digits as its factorization.

5561657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31500, while the sum is 35.

The square root of 5561657 is about 2358.3165606000. The cubic root of 5561657 is about 177.1745753310.

The spelling of 5561657 in words is "five million, five hundred sixty-one thousand, six hundred fifty-seven".