861333489 has 12 divisors (see below), whose sum is σ = 1246752000. Its totient is φ = 573020664.

The previous prime is 861333467. The next prime is 861333503. The reversal of 861333489 is 984333168.

It is not a de Polignac number, because 861333489 - 2²⁷ = 727115761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (861333449) 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 in 11 ways as a sum of consecutive naturals, for example, 95589 + ... + 104210.

It is an arithmetic number, because the mean of its divisors is an integer number (103896000).

Almost surely, 2^861333489 is an apocalyptic number.

It is an amenable number.

861333489 is a deficient number, since it is larger than the sum of its proper divisors (385418511).

861333489 is a wasteful number, since it uses less digits than its factorization.

861333489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200284 (or 200281 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 861333489 is about 29348.4835894463. The cubic root of 861333489 is about 951.4598014704.

The spelling of 861333489 in words is "eight hundred sixty-one million, three hundred thirty-three thousand, four hundred eighty-nine".