849547609 has 3 divisors (see below), whose sum is σ = 849576757. Its totient is φ = 849518462.

The previous prime is 849547553. The next prime is 849547669. The reversal of 849547609 is 906745948.

It is a happy number.

The square root of 849547609 is 29147.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 849547609 - 2¹¹ = 849545561 is a prime.

It is a super-2 number, since 2×849547609² = 1443462279915233762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (849547669) 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 2 ways as a sum of consecutive naturals, for example, 14574 + ... + 43720.

Almost surely, 2^849547609 is an apocalyptic number.

849547609 is the 29147-th square number.

849547609 is the 14574-th centered octagonal number.

It is an amenable number.

849547609 is a deficient number, since it is larger than the sum of its proper divisors (29148).

849547609 is an frugal number, since it uses more digits than its factorization.

849547609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58294 (or 29147 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The cubic root of 849547609 is about 947.1001541768.

The spelling of 849547609 in words is "eight hundred forty-nine million, five hundred forty-seven thousand, six hundred nine".