859431899 has 2 divisors, whose sum is σ = 859431900. Its totient is φ = 859431898.

The previous prime is 859431829. The next prime is 859431929. The reversal of 859431899 is 998134958.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 859431899 - 2²⁸ = 590996443 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (859431809) 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 as a sum of consecutive naturals, namely, 429715949 + 429715950.

It is an arithmetic number, because the mean of its divisors is an integer number (429715950).

Almost surely, 2^859431899 is an apocalyptic number.

859431899 is a deficient number, since it is larger than the sum of its proper divisors (1).

859431899 is an equidigital number, since it uses as much as digits as its factorization.

859431899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 56.

The square root of 859431899 is about 29316.0689554381. The cubic root of 859431899 is about 950.7590974368.

The spelling of 859431899 in words is "eight hundred fifty-nine million, four hundred thirty-one thousand, eight hundred ninety-nine".