8191061 has 4 divisors (see below), whose sum is σ = 8210412. Its totient is φ = 8171712.

The previous prime is 8191049. The next prime is 8191069. The reversal of 8191061 is 1601918.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1601918 = 2 ⋅800959.

It can be written as a sum of positive squares in 2 ways, for example, as 3632836 + 4558225 = 1906^2 + 2135^2 .

It is a cyclic number.

It is not a de Polignac number, because 8191061 - 2⁶ = 8190997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8191061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8191069) 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, 9026 + ... + 9891.

It is an arithmetic number, because the mean of its divisors is an integer number (2052603).

Almost surely, 2^8191061 is an apocalyptic number.

It is an amenable number.

8191061 is a deficient number, since it is larger than the sum of its proper divisors (19351).

8191061 is a wasteful number, since it uses less digits than its factorization.

8191061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19350.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 8191061 is about 2862.0029699495. The cubic root of 8191061 is about 201.5796654371.

Adding to 8191061 its reverse (1601918), we get a palindrome (9792979).

The spelling of 8191061 in words is "eight million, one hundred ninety-one thousand, sixty-one".