859431387 has 8 divisors (see below), whose sum is σ = 1150368336. Its totient is φ = 570724352.

The previous prime is 859431373. The next prime is 859431403. The reversal of 859431387 is 783134958.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 859431387 - 2⁴ = 859431371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (859431337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556578 + ... + 558119.

It is an arithmetic number, because the mean of its divisors is an integer number (143796042).

Almost surely, 2^859431387 is an apocalyptic number.

859431387 is a deficient number, since it is larger than the sum of its proper divisors (290936949).

859431387 is a wasteful number, since it uses less digits than its factorization.

859431387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114957.

The product of its digits is 725760, while the sum is 48.

The square root of 859431387 is about 29316.0602230245. The cubic root of 859431387 is about 950.7589086343.

The spelling of 859431387 in words is "eight hundred fifty-nine million, four hundred thirty-one thousand, three hundred eighty-seven".