8561369 has 4 divisors (see below), whose sum is σ = 8571444. Its totient is φ = 8551296.

The previous prime is 8561347. The next prime is 8561383. The reversal of 8561369 is 9631658.

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

It can be written as a sum of positive squares in 2 ways, for example, as 238144 + 8323225 = 488^2 + 2885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8561369 is a prime.

It is a super-2 number, since 2×8561369² = 146594078308322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8561339) 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, 3632 + ... + 5505.

It is an arithmetic number, because the mean of its divisors is an integer number (2142861).

Almost surely, 2^8561369 is an apocalyptic number.

It is an amenable number.

8561369 is a deficient number, since it is larger than the sum of its proper divisors (10075).

8561369 is an equidigital number, since it uses as much as digits as its factorization.

8561369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10074.

The product of its digits is 38880, while the sum is 38.

The square root of 8561369 is about 2925.9817155956. The cubic root of 8561369 is about 204.5727289571.

The spelling of 8561369 in words is "eight million, five hundred sixty-one thousand, three hundred sixty-nine".