8106591 has 4 divisors (see below), whose sum is σ = 10808792. Its totient is φ = 5404392.

The previous prime is 8106587. The next prime is 8106599. The reversal of 8106591 is 1956018.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 8106591 - 2² = 8106587 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8106599) 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, 1351096 + ... + 1351101.

It is an arithmetic number, because the mean of its divisors is an integer number (2702198).

Almost surely, 2^8106591 is an apocalyptic number.

8106591 is a deficient number, since it is larger than the sum of its proper divisors (2702201).

8106591 is a wasteful number, since it uses less digits than its factorization.

8106591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2702200.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 8106591 is about 2847.2075793661. The cubic root of 8106591 is about 200.8843422637.

The spelling of 8106591 in words is "eight million, one hundred six thousand, five hundred ninety-one".