561763 has 4 divisors (see below), whose sum is σ = 564408. Its totient is φ = 559120.

The previous prime is 561761. The next prime is 561767. The reversal of 561763 is 367165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 367165 = 5 ⋅73433.

It is a cyclic number.

It is not a de Polignac number, because 561763 - 2¹ = 561761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561761) 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, 973 + ... + 1438.

It is an arithmetic number, because the mean of its divisors is an integer number (141102).

2⁵⁶¹⁷⁶³ is an apocalyptic number.

561763 is a deficient number, since it is larger than the sum of its proper divisors (2645).

561763 is a wasteful number, since it uses less digits than its factorization.

561763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2644.

The product of its digits is 3780, while the sum is 28.

The square root of 561763 is about 749.5085056222. The cubic root of 561763 is about 82.5121133116.

The spelling of 561763 in words is "five hundred sixty-one thousand, seven hundred sixty-three".