561672289 has 4 divisors (see below), whose sum is σ = 561726256. Its totient is φ = 561618324.

The previous prime is 561672283. The next prime is 561672301. The reversal of 561672289 is 982276165.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 561672289 - 2⁵ = 561672257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561672283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5859 + ... + 34024.

It is an arithmetic number, because the mean of its divisors is an integer number (140431564).

Almost surely, 2^561672289 is an apocalyptic number.

It is an amenable number.

561672289 is a deficient number, since it is larger than the sum of its proper divisors (53967).

561672289 is a wasteful number, since it uses less digits than its factorization.

561672289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53966.

The product of its digits is 362880, while the sum is 46.

The square root of 561672289 is about 23699.6263472655. The cubic root of 561672289 is about 825.0767184242.

The spelling of 561672289 in words is "five hundred sixty-one million, six hundred seventy-two thousand, two hundred eighty-nine".