856140093 has 24 divisors (see below), whose sum is σ = 1253291832. Its totient is φ = 563125248.

The previous prime is 856140083. The next prime is 856140121. The reversal of 856140093 is 390041658.

856140093 is a `hidden beast` number, since 8 + 561 + 4 + 0 + 0 + 93 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 177902244 + 678237849 = 13338^2 + 26043^2 .

It is not a de Polignac number, because 856140093 - 2²⁴ = 839362877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856140053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 235155 + ... + 238767.

It is an arithmetic number, because the mean of its divisors is an integer number (52220493).

Almost surely, 2^856140093 is an apocalyptic number.

It is an amenable number.

856140093 is a deficient number, since it is larger than the sum of its proper divisors (397151739).

856140093 is a wasteful number, since it uses less digits than its factorization.

856140093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3965 (or 3962 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 856140093 is about 29259.8717187892. The cubic root of 856140093 is about 949.5436748410.

The spelling of 856140093 in words is "eight hundred fifty-six million, one hundred forty thousand, ninety-three".