859331989 has 8 divisors (see below), whose sum is σ = 863755200. Its totient is φ = 854919936.

The previous prime is 859331969. The next prime is 859332007. The reversal of 859331989 is 989133958.

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 859331989 - 2⁹ = 859331477 is a prime.

It is a super-2 number, since 2×859331989² = 1476902934637392242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (859331969) 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, 181557 + ... + 186229.

It is an arithmetic number, because the mean of its divisors is an integer number (107969400).

Almost surely, 2^859331989 is an apocalyptic number.

It is an amenable number.

859331989 is a deficient number, since it is larger than the sum of its proper divisors (4423211).

859331989 is a wasteful number, since it uses less digits than its factorization.

859331989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5579.

The product of its digits is 2099520, while the sum is 55.

The square root of 859331989 is about 29314.3648916363. The cubic root of 859331989 is about 950.7222537099.

The spelling of 859331989 in words is "eight hundred fifty-nine million, three hundred thirty-one thousand, nine hundred eighty-nine".