859091939 has 2 divisors, whose sum is σ = 859091940. Its totient is φ = 859091938.

The previous prime is 859091887. The next prime is 859091941. The reversal of 859091939 is 939190958.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 859091939 - 2⁸ = 859091683 is a prime.

It is a Sophie Germain prime.

Together with 859091941, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (859091339) 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, 429545969 + 429545970.

It is an arithmetic number, because the mean of its divisors is an integer number (429545970).

Almost surely, 2^859091939 is an apocalyptic number.

859091939 is a deficient number, since it is larger than the sum of its proper divisors (1).

859091939 is an equidigital number, since it uses as much as digits as its factorization.

859091939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 787320, while the sum is 53.

The square root of 859091939 is about 29310.2701966393. The cubic root of 859091939 is about 950.6337189977.

It can be divided in two parts, 8590919 and 39, that added together give a palindrome (8590958).

The spelling of 859091939 in words is "eight hundred fifty-nine million, ninety-one thousand, nine hundred thirty-nine".