853706491 has 4 divisors (see below), whose sum is σ = 931316184. Its totient is φ = 776096800.

The previous prime is 853706473. The next prime is 853706501. The reversal of 853706491 is 194607358.

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 853706491 - 2⁷ = 853706363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (853706401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38804830 + ... + 38804851.

It is an arithmetic number, because the mean of its divisors is an integer number (232829046).

Almost surely, 2^853706491 is an apocalyptic number.

853706491 is a deficient number, since it is larger than the sum of its proper divisors (77609693).

853706491 is a wasteful number, since it uses less digits than its factorization.

853706491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77609692.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 853706491 is about 29218.2561252379. The cubic root of 853706491 is about 948.6431195913.

The spelling of 853706491 in words is "eight hundred fifty-three million, seven hundred six thousand, four hundred ninety-one".