561383 has 4 divisors (see below), whose sum is σ = 570648. Its totient is φ = 552120.

The previous prime is 561377. The next prime is 561389. The reversal of 561383 is 383165.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (561377) and next prime (561389).

It is a cyclic number.

It is not a de Polignac number, because 561383 - 2⁴ = 561367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561389) 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, 4541 + ... + 4662.

It is an arithmetic number, because the mean of its divisors is an integer number (142662).

2⁵⁶¹³⁸³ is an apocalyptic number.

561383 is a deficient number, since it is larger than the sum of its proper divisors (9265).

561383 is an equidigital number, since it uses as much as digits as its factorization.

561383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9264.

The product of its digits is 2160, while the sum is 26.

The square root of 561383 is about 749.2549632802. The cubic root of 561383 is about 82.4935042330.

The spelling of 561383 in words is "five hundred sixty-one thousand, three hundred eighty-three".