561773 has 4 divisors (see below), whose sum is σ = 591360. Its totient is φ = 532188.

The previous prime is 561767. The next prime is 561787. The reversal of 561773 is 377165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561773 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14765 + ... + 14802.

It is an arithmetic number, because the mean of its divisors is an integer number (147840).

2⁵⁶¹⁷⁷³ is an apocalyptic number.

It is an amenable number.

561773 is a deficient number, since it is larger than the sum of its proper divisors (29587).

561773 is a wasteful number, since it uses less digits than its factorization.

561773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29586.

The product of its digits is 4410, while the sum is 29.

The square root of 561773 is about 749.5151766309. The cubic root of 561773 is about 82.5126029109.

The spelling of 561773 in words is "five hundred sixty-one thousand, seven hundred seventy-three".