859971487 has 2 divisors, whose sum is σ = 859971488. Its totient is φ = 859971486.

The previous prime is 859971451. The next prime is 859971493. The reversal of 859971487 is 784179958.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-859971487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (859921487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429985743 + 429985744.

It is an arithmetic number, because the mean of its divisors is an integer number (429985744).

Almost surely, 2^859971487 is an apocalyptic number.

859971487 is a deficient number, since it is larger than the sum of its proper divisors (1).

859971487 is an equidigital number, since it uses as much as digits as its factorization.

859971487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5080320, while the sum is 58.

The square root of 859971487 is about 29325.2704505858. The cubic root of 859971487 is about 950.9580315129.

The spelling of 859971487 in words is "eight hundred fifty-nine million, nine hundred seventy-one thousand, four hundred eighty-seven".