989561773 has 8 divisors (see below), whose sum is σ = 1025914176. Its totient is φ = 953791200.

The previous prime is 989561717. The next prime is 989561779. The reversal of 989561773 is 377165989.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 989561773 - 2²⁵ = 956007341 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 (989561779) 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 7 ways as a sum of consecutive naturals, for example, 141993 + ... + 148798.

It is an arithmetic number, because the mean of its divisors is an integer number (128239272).

Almost surely, 2^989561773 is an apocalyptic number.

It is an amenable number.

989561773 is a deficient number, since it is larger than the sum of its proper divisors (36352403).

989561773 is a wasteful number, since it uses less digits than its factorization.

989561773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290915.

The product of its digits is 2857680, while the sum is 55.

The square root of 989561773 is about 31457.3007901187. The cubic root of 989561773 is about 996.5084140162.

The spelling of 989561773 in words is "nine hundred eighty-nine million, five hundred sixty-one thousand, seven hundred seventy-three".