859371493 has 4 divisors (see below), whose sum is σ = 859618540. Its totient is φ = 859124448.

The previous prime is 859371481. The next prime is 859371497. The reversal of 859371493 is 394173958.

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 35796289 + 823575204 = 5983^2 + 28698^2 .

It is a cyclic number.

It is not a de Polignac number, because 859371493 - 2¹³ = 859363301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (859371497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118230 + ... + 125287.

It is an arithmetic number, because the mean of its divisors is an integer number (214904635).

Almost surely, 2^859371493 is an apocalyptic number.

It is an amenable number.

859371493 is a deficient number, since it is larger than the sum of its proper divisors (247047).

859371493 is a wasteful number, since it uses less digits than its factorization.

859371493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247046.

The product of its digits is 816480, while the sum is 49.

The square root of 859371493 is about 29315.0386832424. The cubic root of 859371493 is about 950.7368219082.

The spelling of 859371493 in words is "eight hundred fifty-nine million, three hundred seventy-one thousand, four hundred ninety-three".