849673439 has 4 divisors (see below), whose sum is σ = 872637624. Its totient is φ = 826709256.

The previous prime is 849673427. The next prime is 849673457. The reversal of 849673439 is 934376948.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 849673439 - 2⁸ = 849673183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (849675439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11482037 + ... + 11482110.

It is an arithmetic number, because the mean of its divisors is an integer number (218159406).

Almost surely, 2^849673439 is an apocalyptic number.

849673439 is a deficient number, since it is larger than the sum of its proper divisors (22964185).

849673439 is a wasteful number, since it uses less digits than its factorization.

849673439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22964184.

The product of its digits is 3919104, while the sum is 53.

The square root of 849673439 is about 29149.1584612661. The cubic root of 849673439 is about 947.1469115050.

The spelling of 849673439 in words is "eight hundred forty-nine million, six hundred seventy-three thousand, four hundred thirty-nine".