8173881 has 9 divisors (see below), whose sum is σ = 11819119. Its totient is φ = 5443536.

The previous prime is 8173871. The next prime is 8173903. The reversal of 8173881 is 1883718.

The square root of 8173881 is 2859.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3404025 + 4769856 = 1845^2 + 2184^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is a de Polignac number, because none of the positive numbers 2^k-8173881 is a prime.

It is a super-2 number, since 2×8173881² = 133624661204322, which contains 22 as substring.

It is a Duffinian number.

8173881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8173811) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8101 + ... + 9053.

Almost surely, 2^8173881 is an apocalyptic number.

8173881 is the 2859-th square number.

8173881 is the 1430-th centered octagonal number.

It is an amenable number.

8173881 is a deficient number, since it is larger than the sum of its proper divisors (3645238).

8173881 is an frugal number, since it uses more digits than its factorization.

8173881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912 (or 956 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The cubic root of 8173881 is about 201.4386351651.

Multiplying 8173881 by its sum of digits (36), we get a square (294259716 = 17154²).

It can be divided in two parts, 8 and 173881, that added together give a square (173889 = 417²).

The spelling of 8173881 in words is "eight million, one hundred seventy-three thousand, eight hundred eighty-one".