918861489 has 104 divisors (see below), whose sum is σ = 1785640640. Its totient is φ = 459165024.

The previous prime is 918861487. The next prime is 918861499. The reversal of 918861489 is 984168819.

918861489 is a `hidden beast` number, since 9 + 18 + 8 + 614 + 8 + 9 = 666.

It is not a de Polignac number, because 918861489 - 2¹ = 918861487 is a prime.

It is a taxicab number since it can be written as a sum of two cubes in more than one way. Here 918861489 = 81³ + 972³ = 729³ + 810³.

It is not an unprimeable number, because it can be changed into a prime (918861487) by changing a digit.

It is a polite number, since it can be written in 103 ways as a sum of consecutive naturals, for example, 48361122 + ... + 48361140.

Almost surely, 2^918861489 is an apocalyptic number.

It is an amenable number.

918861489 is a deficient number, since it is larger than the sum of its proper divisors (866779151).

918861489 is an frugal number, since it uses more digits than its factorization.

918861489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75 (or 42 counting only the distinct ones).

The product of its digits is 995328, while the sum is 54.

The square root of 918861489 is about 30312.7281682134. The cubic root of 918861489 is about 972.1874638426.

The spelling of 918861489 in words is "nine hundred eighteen million, eight hundred sixty-one thousand, four hundred eighty-nine".