561219673 has 4 divisors (see below), whose sum is σ = 641393920. Its totient is φ = 481045428.

The previous prime is 561219649. The next prime is 561219677. The reversal of 561219673 is 376912165.

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.

It is a cyclic number.

It is not a de Polignac number, because 561219673 - 2⁹ = 561219161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561219677) 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, 40087113 + ... + 40087126.

It is an arithmetic number, because the mean of its divisors is an integer number (160348480).

Almost surely, 2^561219673 is an apocalyptic number.

It is an amenable number.

561219673 is a deficient number, since it is larger than the sum of its proper divisors (80174247).

561219673 is an equidigital number, since it uses as much as digits as its factorization.

561219673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80174246.

The product of its digits is 68040, while the sum is 40.

The square root of 561219673 is about 23690.0754114460. The cubic root of 561219673 is about 824.8550332366.

The spelling of 561219673 in words is "five hundred sixty-one million, two hundred nineteen thousand, six hundred seventy-three".