8405897 has 4 divisors (see below), whose sum is σ = 8454660. Its totient is φ = 8357136.

The previous prime is 8405863. The next prime is 8405899. The reversal of 8405897 is 7985048.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6739216 + 1666681 = 2596^2 + 1291^2 .

It is a cyclic number.

It is not a de Polignac number, because 8405897 - 2¹⁰ = 8404873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8405899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24122 + ... + 24467.

It is an arithmetic number, because the mean of its divisors is an integer number (2113665).

Almost surely, 2^8405897 is an apocalyptic number.

It is an amenable number.

8405897 is a deficient number, since it is larger than the sum of its proper divisors (48763).

8405897 is a wasteful number, since it uses less digits than its factorization.

8405897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48762.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 8405897 is about 2899.2924999041. The cubic root of 8405897 is about 203.3268291986.

The spelling of 8405897 in words is "eight million, four hundred five thousand, eight hundred ninety-seven".