849904173 has 6 divisors (see below), whose sum is σ = 1227639374. Its totient is φ = 566602776.

The previous prime is 849904169. The next prime is 849904177. The reversal of 849904173 is 371409948.

It is an interprime number because it is at equal distance from previous prime (849904169) and next prime (849904177).

It can be written as a sum of positive squares in only one way, i.e., 672001929 + 177902244 = 25923^2 + 13338^2 .

It is not a de Polignac number, because 849904173 - 2² = 849904169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (849904177) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47216890 + ... + 47216907.

Almost surely, 2^849904173 is an apocalyptic number.

It is an amenable number.

849904173 is a deficient number, since it is larger than the sum of its proper divisors (377735201).

849904173 is a wasteful number, since it uses less digits than its factorization.

849904173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94433803 (or 94433800 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 849904173 is about 29153.1160084132. The cubic root of 849904173 is about 947.2326382507.

The spelling of 849904173 in words is "eight hundred forty-nine million, nine hundred four thousand, one hundred seventy-three".