918489589 has 4 divisors (see below), whose sum is σ = 939849856. Its totient is φ = 897129324.

The previous prime is 918489587. The next prime is 918489623. The reversal of 918489589 is 985984819.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 985984819 = 17 ⋅57999107.

It is a cyclic number.

It is not a de Polignac number, because 918489589 - 2¹ = 918489587 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918489581) 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 3 ways as a sum of consecutive naturals, for example, 10680069 + ... + 10680154.

It is an arithmetic number, because the mean of its divisors is an integer number (234962464).

Almost surely, 2^918489589 is an apocalyptic number.

It is an amenable number.

918489589 is a deficient number, since it is larger than the sum of its proper divisors (21360267).

918489589 is a wasteful number, since it uses less digits than its factorization.

918489589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21360266.

The product of its digits is 7464960, while the sum is 61.

The square root of 918489589 is about 30306.5931605649. The cubic root of 918489589 is about 972.0562850916.

The spelling of 918489589 in words is "nine hundred eighteen million, four hundred eighty-nine thousand, five hundred eighty-nine".