854171993 has 4 divisors (see below), whose sum is σ = 854402868. Its totient is φ = 853941120.

The previous prime is 854171971. The next prime is 854172001. The reversal of 854171993 is 399171458.

854171993 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.

It can be written as a sum of positive squares in 2 ways, for example, as 469502224 + 384669769 = 21668^2 + 19613^2 .

It is a cyclic number.

It is not a de Polignac number, because 854171993 - 2¹⁶ = 854106457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (854171093) 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, 109796 + ... + 117317.

It is an arithmetic number, because the mean of its divisors is an integer number (213600717).

Almost surely, 2^854171993 is an apocalyptic number.

It is an amenable number.

854171993 is a deficient number, since it is larger than the sum of its proper divisors (230875).

854171993 is a wasteful number, since it uses less digits than its factorization.

854171993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230874.

The product of its digits is 272160, while the sum is 47.

The square root of 854171993 is about 29226.2209839042. The cubic root of 854171993 is about 948.8155110144.

The spelling of 854171993 in words is "eight hundred fifty-four million, one hundred seventy-one thousand, nine hundred ninety-three".