849907091 has 4 divisors (see below), whose sum is σ = 927171384. Its totient is φ = 772642800.

The previous prime is 849907049. The next prime is 849907111. The reversal of 849907091 is 190709948.

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 849907091 - 2²⁶ = 782798227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (849907001) 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, 38632130 + ... + 38632151.

It is an arithmetic number, because the mean of its divisors is an integer number (231792846).

Almost surely, 2^849907091 is an apocalyptic number.

849907091 is a deficient number, since it is larger than the sum of its proper divisors (77264293).

849907091 is a wasteful number, since it uses less digits than its factorization.

849907091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77264292.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 849907091 is about 29153.1660544785. The cubic root of 849907091 is about 947.2337223030.

The spelling of 849907091 in words is "eight hundred forty-nine million, nine hundred seven thousand, ninety-one".