8197405 has 4 divisors (see below), whose sum is σ = 9836892. Its totient is φ = 6557920.

The previous prime is 8197403. The next prime is 8197429. The reversal of 8197405 is 5047918.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5047918 = 2 ⋅2523959.

It can be written as a sum of positive squares in 2 ways, for example, as 2490084 + 5707321 = 1578^2 + 2389^2 .

It is not a de Polignac number, because 8197405 - 2¹ = 8197403 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8197403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 819736 + ... + 819745.

It is an arithmetic number, because the mean of its divisors is an integer number (2459223).

Almost surely, 2^8197405 is an apocalyptic number.

It is an amenable number.

8197405 is a deficient number, since it is larger than the sum of its proper divisors (1639487).

8197405 is a wasteful number, since it uses less digits than its factorization.

8197405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1639486.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 8197405 is about 2863.1110701473. Note that the first 3 decimals coincide. The cubic root of 8197405 is about 201.6316933486.

The spelling of 8197405 in words is "eight million, one hundred ninety-seven thousand, four hundred five".