561607 has 2 divisors, whose sum is σ = 561608. Its totient is φ = 561606.

The previous prime is 561599. The next prime is 561667. The reversal of 561607 is 706165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561607 - 2³ = 561599 is a prime.

It is an Ulam number.

561607 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280803 + 280804.

It is an arithmetic number, because the mean of its divisors is an integer number (280804).

2⁵⁶¹⁶⁰⁷ is an apocalyptic number.

561607 is a deficient number, since it is larger than the sum of its proper divisors (1).

561607 is an equidigital number, since it uses as much as digits as its factorization.

561607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 561607 is about 749.4044301977. The cubic root of 561607 is about 82.5044748108.

The spelling of 561607 in words is "five hundred sixty-one thousand, six hundred seven".