561838673 has 8 divisors (see below), whose sum is σ = 629480640. Its totient is φ = 496957680.

The previous prime is 561838657. The next prime is 561838789. The reversal of 561838673 is 376838165.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 561838673 - 2⁴ = 561838657 is a prime.

It is a super-3 number, since 3×561838673³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561838643) 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, 689813 + ... + 690626.

It is an arithmetic number, because the mean of its divisors is an integer number (78685080).

Almost surely, 2^561838673 is an apocalyptic number.

It is an amenable number.

561838673 is a deficient number, since it is larger than the sum of its proper divisors (67641967).

561838673 is a wasteful number, since it uses less digits than its factorization.

561838673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380487.

The product of its digits is 725760, while the sum is 47.

The square root of 561838673 is about 23703.1363536558. The cubic root of 561838673 is about 825.1581811171.

The spelling of 561838673 in words is "five hundred sixty-one million, eight hundred thirty-eight thousand, six hundred seventy-three".