561769 has 8 divisors (see below), whose sum is σ = 613760. Its totient is φ = 511056.

The previous prime is 561767. The next prime is 561787. The reversal of 561769 is 967165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 561769 - 2¹ = 561767 is a prime.

It is a super-2 number, since 2×561769² = 631168818722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 754 + ... + 1300.

It is an arithmetic number, because the mean of its divisors is an integer number (76720).

2⁵⁶¹⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

561769 is a deficient number, since it is larger than the sum of its proper divisors (51991).

561769 is a wasteful number, since it uses less digits than its factorization.

561769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639.

The product of its digits is 11340, while the sum is 34.

The square root of 561769 is about 749.5125082345. The cubic root of 561769 is about 82.5124070719.

The spelling of 561769 in words is "five hundred sixty-one thousand, seven hundred sixty-nine".