8149409 has 4 divisors (see below), whose sum is σ = 8628804. Its totient is φ = 7670016.

The previous prime is 8149381. The next prime is 8149457. The reversal of 8149409 is 9049418.

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 2650384 + 5499025 = 1628^2 + 2345^2 .

It is a cyclic number.

It is not a de Polignac number, because 8149409 - 2²⁰ = 7100833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8149459) 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, 239672 + ... + 239705.

It is an arithmetic number, because the mean of its divisors is an integer number (2157201).

Almost surely, 2^8149409 is an apocalyptic number.

It is an amenable number.

8149409 is a deficient number, since it is larger than the sum of its proper divisors (479395).

8149409 is a wasteful number, since it uses less digits than its factorization.

8149409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479394.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 8149409 is about 2854.7169737121. The cubic root of 8149409 is about 201.2374033755.

Subtracting 8149409 from its reverse (9049418), we obtain a palindrome (900009).

It can be divided in two parts, 8149 and 409, that added together give a palindrome (8558).

The spelling of 8149409 in words is "eight million, one hundred forty-nine thousand, four hundred nine".