873745561 has 8 divisors (see below), whose sum is σ = 941361344. Its totient is φ = 806187600.

The previous prime is 873745513. The next prime is 873745591. The reversal of 873745561 is 165547378.

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 873745561 - 2¹¹ = 873743513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (873745511) 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, 19990 + ... + 46336.

It is an arithmetic number, because the mean of its divisors is an integer number (117670168).

Almost surely, 2^873745561 is an apocalyptic number.

It is an amenable number.

873745561 is a deficient number, since it is larger than the sum of its proper divisors (67615783).

873745561 is a wasteful number, since it uses less digits than its factorization.

873745561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28911.

The product of its digits is 705600, while the sum is 46.

The square root of 873745561 is about 29559.1874211725. The cubic root of 873745561 is about 956.0082955490.

The spelling of 873745561 in words is "eight hundred seventy-three million, seven hundred forty-five thousand, five hundred sixty-one".