857849611 has 4 divisors (see below), whose sum is σ = 866178352. Its totient is φ = 849520872.

The previous prime is 857849599. The next prime is 857849633. The reversal of 857849611 is 116948758.

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 857849611 - 2²¹ = 855752459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857849651) 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, 4164216 + ... + 4164421.

It is an arithmetic number, because the mean of its divisors is an integer number (216544588).

Almost surely, 2^857849611 is an apocalyptic number.

857849611 is a deficient number, since it is larger than the sum of its proper divisors (8328741).

857849611 is a wasteful number, since it uses less digits than its factorization.

857849611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8328740.

The product of its digits is 483840, while the sum is 49.

The square root of 857849611 is about 29289.0698213514. The cubic root of 857849611 is about 950.1752625859.

The spelling of 857849611 in words is "eight hundred fifty-seven million, eight hundred forty-nine thousand, six hundred eleven".