5661973 has 2 divisors, whose sum is σ = 5661974. Its totient is φ = 5661972.

The previous prime is 5661961. The next prime is 5661991. The reversal of 5661973 is 3791665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4986289 + 675684 = 2233^2 + 822^2 .

It is a cyclic number.

It is not a de Polignac number, because 5661973 - 2⁵ = 5661941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5661923) by changing a digit.

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 as a sum of consecutive naturals, namely, 2830986 + 2830987.

It is an arithmetic number, because the mean of its divisors is an integer number (2830987).

Almost surely, 2^5661973 is an apocalyptic number.

It is an amenable number.

5661973 is a deficient number, since it is larger than the sum of its proper divisors (1).

5661973 is an equidigital number, since it uses as much as digits as its factorization.

5661973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 37.

The square root of 5661973 is about 2379.4900714229. The cubic root of 5661973 is about 178.2334709384.

The spelling of 5661973 in words is "five million, six hundred sixty-one thousand, nine hundred seventy-three".