8409091 has 4 divisors (see below), whose sum is σ = 8680384. Its totient is φ = 8137800.

The previous prime is 8409073. The next prime is 8409097. The reversal of 8409091 is 1909048.

8409091 is digitally balanced in base 3, 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.

It is a cyclic number.

It is not a de Polignac number, because 8409091 - 2¹⁷ = 8278019 is a prime.

It is a super-2 number, since 2×8409091² = 141425622892562, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 271261 = 8409091 / (8 + 4 + 0 + 9 + 0 + 9 + 1).

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8409097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135600 + ... + 135661.

It is an arithmetic number, because the mean of its divisors is an integer number (2170096).

Almost surely, 2^8409091 is an apocalyptic number.

8409091 is a deficient number, since it is larger than the sum of its proper divisors (271293).

8409091 is a wasteful number, since it uses less digits than its factorization.

8409091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271292.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 8409091 is about 2899.8432716269. The cubic root of 8409091 is about 203.3525787272.

The spelling of 8409091 in words is "eight million, four hundred nine thousand, ninety-one".