8163409 has 4 divisors (see below), whose sum is σ = 8177904. Its totient is φ = 8148916.

The previous prime is 8163401. The next prime is 8163427. The reversal of 8163409 is 9043618.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8163409 - 2³ = 8163401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8163401) 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, 6367 + ... + 7540.

It is an arithmetic number, because the mean of its divisors is an integer number (2044476).

Almost surely, 2^8163409 is an apocalyptic number.

It is an amenable number.

8163409 is a deficient number, since it is larger than the sum of its proper divisors (14495).

8163409 is a wasteful number, since it uses less digits than its factorization.

8163409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14494.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 8163409 is about 2857.1680034608. The cubic root of 8163409 is about 201.3525737671.

It can be divided in two parts, 816 and 3409, that added together give a square (4225 = 65²).

The spelling of 8163409 in words is "eight million, one hundred sixty-three thousand, four hundred nine".