849409 has 8 divisors (see below), whose sum is σ = 952128. Its totient is φ = 750960.

The previous prime is 849391. The next prime is 849419. The reversal of 849409 is 904948.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 849409 - 2¹¹ = 847361 is a prime.

It is a Duffinian number.

849409 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (849419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 637 + ... + 1450.

It is an arithmetic number, because the mean of its divisors is an integer number (119016).

2⁸⁴⁹⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

849409 is a deficient number, since it is larger than the sum of its proper divisors (102719).

849409 is a wasteful number, since it uses less digits than its factorization.

849409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 849409 is about 921.6338752455. The cubic root of 849409 is about 94.7048642939.

The spelling of 849409 in words is "eight hundred forty-nine thousand, four hundred nine".