561907 has 2 divisors, whose sum is σ = 561908. Its totient is φ = 561906.

The previous prime is 561839. The next prime is 561917. The reversal of 561907 is 709165.

It is a happy number.

561907 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561907 - 2¹¹ = 559859 is a prime.

It is a Chen prime.

561907 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (561917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280953 + 280954.

It is an arithmetic number, because the mean of its divisors is an integer number (280954).

2⁵⁶¹⁹⁰⁷ is an apocalyptic number.

561907 is a deficient number, since it is larger than the sum of its proper divisors (1).

561907 is an equidigital number, since it uses as much as digits as its factorization.

561907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 561907 is about 749.6045624194. The cubic root of 561907 is about 82.5191629804.

The spelling of 561907 in words is "five hundred sixty-one thousand, nine hundred seven".