873427561 has 4 divisors (see below), whose sum is σ = 873862612. Its totient is φ = 872992512.

The previous prime is 873427559. The next prime is 873427571. The reversal of 873427561 is 165724378.

873427561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 313821225 + 559606336 = 17715^2 + 23656^2 .

It is a cyclic number.

It is not a de Polignac number, because 873427561 - 2¹ = 873427559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (873427531) 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, 214500 + ... + 218533.

It is an arithmetic number, because the mean of its divisors is an integer number (218465653).

Almost surely, 2^873427561 is an apocalyptic number.

It is an amenable number.

873427561 is a deficient number, since it is larger than the sum of its proper divisors (435051).

873427561 is a wasteful number, since it uses less digits than its factorization.

873427561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435050.

The product of its digits is 282240, while the sum is 43.

The square root of 873427561 is about 29553.8078934001. The cubic root of 873427561 is about 955.8923016256.

The spelling of 873427561 in words is "eight hundred seventy-three million, four hundred twenty-seven thousand, five hundred sixty-one".