989085655 has 4 divisors (see below), whose sum is σ = 1186902792. Its totient is φ = 791268520.

The previous prime is 989085607. The next prime is 989085661. The reversal of 989085655 is 556580989.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 556580989 = 179 ⋅3109391.

It is not a de Polignac number, because 989085655 - 2¹⁵ = 989052887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 989085596 and 989085605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98908561 + ... + 98908570.

It is an arithmetic number, because the mean of its divisors is an integer number (296725698).

Almost surely, 2^989085655 is an apocalyptic number.

989085655 is a deficient number, since it is larger than the sum of its proper divisors (197817137).

989085655 is a wasteful number, since it uses less digits than its factorization.

989085655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197817136.

The product of its (nonzero) digits is 3888000, while the sum is 55.

The square root of 989085655 is about 31449.7321928184. The cubic root of 989085655 is about 996.3485682745.

The spelling of 989085655 in words is "nine hundred eighty-nine million, eighty-five thousand, six hundred fifty-five".