873781681 has 8 divisors (see below), whose sum is σ = 890166240. Its totient is φ = 857449728.

The previous prime is 873781673. The next prime is 873781697. The reversal of 873781681 is 186187378.

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 873781681 - 2³ = 873781673 is a prime.

It is a super-4 number, since 4×873781681⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (873781621) 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, 21210 + ... + 46876.

It is an arithmetic number, because the mean of its divisors is an integer number (111270780).

Almost surely, 2^873781681 is an apocalyptic number.

It is an amenable number.

873781681 is a deficient number, since it is larger than the sum of its proper divisors (16384559).

873781681 is a wasteful number, since it uses less digits than its factorization.

873781681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26303.

The product of its digits is 451584, while the sum is 49.

The square root of 873781681 is about 29559.7983924113. The cubic root of 873781681 is about 956.0214689278.

The spelling of 873781681 in words is "eight hundred seventy-three million, seven hundred eighty-one thousand, six hundred eighty-one".