8167641 has 4 divisors (see below), whose sum is σ = 10890192. Its totient is φ = 5445092.

The previous prime is 8167637. The next prime is 8167673. The reversal of 8167641 is 1467618.

It is a happy number.

8167641 is digitally balanced in base 4, 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8167641 - 2² = 8167637 is a prime.

8167641 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8167541) 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, 1361271 + ... + 1361276.

It is an arithmetic number, because the mean of its divisors is an integer number (2722548).

Almost surely, 2^8167641 is an apocalyptic number.

8167641 is the 1808-th centered pentagonal number.

It is an amenable number.

8167641 is a deficient number, since it is larger than the sum of its proper divisors (2722551).

8167641 is a wasteful number, since it uses less digits than its factorization.

8167641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2722550.

The product of its digits is 8064, while the sum is 33.

The square root of 8167641 is about 2857.9085009846. The cubic root of 8167641 is about 201.3873622108.

The spelling of 8167641 in words is "eight million, one hundred sixty-seven thousand, six hundred forty-one".