561279773 has 2 divisors, whose sum is σ = 561279774. Its totient is φ = 561279772.

The previous prime is 561279757. The next prime is 561279793. The reversal of 561279773 is 377972165.

561279773 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343805764 + 217474009 = 18542^2 + 14747^2 .

It is a cyclic number.

It is not a de Polignac number, because 561279773 - 2⁴ = 561279757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561279793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280639886 + 280639887.

It is an arithmetic number, because the mean of its divisors is an integer number (280639887).

Almost surely, 2^561279773 is an apocalyptic number.

It is an amenable number.

561279773 is a deficient number, since it is larger than the sum of its proper divisors (1).

561279773 is an equidigital number, since it uses as much as digits as its factorization.

561279773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 555660, while the sum is 47.

The square root of 561279773 is about 23691.3438411585. The cubic root of 561279773 is about 824.8844762637.

The spelling of 561279773 in words is "five hundred sixty-one million, two hundred seventy-nine thousand, seven hundred seventy-three".