561546437 has 2 divisors, whose sum is σ = 561546438. Its totient is φ = 561546436.

The previous prime is 561546413. The next prime is 561546439. The reversal of 561546437 is 734645165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 561026596 + 519841 = 23686^2 + 721^2 .

It is a cyclic number.

It is not a de Polignac number, because 561546437 - 2²⁴ = 544769221 is a prime.

Together with 561546439, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 561546394 and 561546403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561546439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280773218 + 280773219.

It is an arithmetic number, because the mean of its divisors is an integer number (280773219).

Almost surely, 2^561546437 is an apocalyptic number.

It is an amenable number.

561546437 is a deficient number, since it is larger than the sum of its proper divisors (1).

561546437 is an equidigital number, since it uses as much as digits as its factorization.

561546437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 41.

The square root of 561546437 is about 23696.9710511702. The cubic root of 561546437 is about 825.0150897760.

The spelling of 561546437 in words is "five hundred sixty-one million, five hundred forty-six thousand, four hundred thirty-seven".