849686291 has 4 divisors (see below), whose sum is σ = 849746592. Its totient is φ = 849625992.

The previous prime is 849686287. The next prime is 849686303. The reversal of 849686291 is 192686948.

It is a happy number.

849686291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 849686291 - 2² = 849686287 is a prime.

It is a super-2 number, since 2×849686291² = 1443933586226673362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (849686221) 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, 3521 + ... + 41373.

It is an arithmetic number, because the mean of its divisors is an integer number (212436648).

Almost surely, 2^849686291 is an apocalyptic number.

849686291 is a deficient number, since it is larger than the sum of its proper divisors (60301).

849686291 is a wasteful number, since it uses less digits than its factorization.

849686291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60300.

The product of its digits is 1492992, while the sum is 53.

The square root of 849686291 is about 29149.3789127659. The cubic root of 849686291 is about 947.1516869360.

The spelling of 849686291 in words is "eight hundred forty-nine million, six hundred eighty-six thousand, two hundred ninety-one".